diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
index 0acfc78d..4c653284 100644
--- a/1-exercises/A-undefined/exercise.js
+++ b/1-exercises/A-undefined/exercise.js
@@ -13,6 +13,8 @@
 let a;
 console.log(a);
 
+// We are seeing "undefined" for a here because even though we declared an "a" variable before but no value has been assigned to "a". 
+
 
 // Example 2
 function sayHello() {
@@ -22,6 +24,8 @@ function sayHello() {
 let hello = sayHello();
 console.log(hello);
 
+// We are seeing "undefined" here because there is no return value from hello which is a function.
+
 
 // Example 3
 function sayHelloToUser(user) {
@@ -30,7 +34,11 @@ function sayHelloToUser(user) {
 
 sayHelloToUser();
 
+// We are seeing "undefined" here because no argument is being passed into the function sayHelloToUser(user). 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+
+// We are seeing "undefined" here because there is no arr[3] in the array, the last item in the array is arr[2].
+
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
index b459888f..9b328d2a 100644
--- a/1-exercises/B-while-loop/exercise.js
+++ b/1-exercises/B-while-loop/exercise.js
@@ -7,6 +7,16 @@
 
 function evenNumbers(n) {
     // TODO
+let counter = 0;
+let arr = [];
+let num = 0;
+while (n>counter) {
+   arr[counter] = num;
+   num = num+2;
+   counter++; 
+}
+
+console.log (arr);
 }
 
 evenNumbers(3); // should output 0,2,4
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
index d584cd75..8f2e90da 100644
--- a/1-exercises/C-while-loop-with-array/exercise.js
+++ b/1-exercises/C-while-loop-with-array/exercise.js
@@ -18,6 +18,15 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+    let counter = 0;
+    while (birthdays[counter].includes("July") === false) {
+        counter++;
+    }
+    
+    return birthdays[counter];
+
+    
+    
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
index f10d0764..f3b03194 100644
--- a/1-exercises/D-do-while/exercise.js
+++ b/1-exercises/D-do-while/exercise.js
@@ -8,8 +8,20 @@
 
 function evenNumbersSum(n) {
     // TODO
+    let sum = 0;
+    let num = 0;
+    let counter = 0;
+    do {
+        sum += num;
+        num += 2;
+        counter++;
+    
+    } while (counter<n);
+
+    return sum;
 }
 
+
 console.log(evenNumbersSum(3)); // should output 6
 console.log(evenNumbersSum(0)); // should output 0
 console.log(evenNumbersSum(10)); // should output 90
\ No newline at end of file
diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
index db5fac64..7a327c9b 100644
--- a/1-exercises/E-for-loop/exercise1.js
+++ b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,7 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
+for ( let i = 0; i < 26; i++) {
     console.log(String.fromCharCode(97 + i));
-    i++;
 }
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
index 081002b2..5d4f3935 100644
--- a/1-exercises/E-for-loop/exercise2.js
+++ b/1-exercises/E-for-loop/exercise2.js
@@ -28,6 +28,10 @@ const AGES = [
 
 // TODO - Write for loop code here
 
+for (let counter = 0; counter < WRITERS.length; counter++) {
+    console.log (`${WRITERS[counter]} is ${AGES[counter]} years old`);
+}
+
 /*
 The output should look something like this:
 
diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
index 65585c6a..2552e046 100644
--- a/1-exercises/F-for-of-loop/exercise.js
+++ b/1-exercises/F-for-of-loop/exercise.js
@@ -11,6 +11,15 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (let item of tubeStations) {
+    console.log(item);
+}
+
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+
+for (let item of str) {
+    let converted = item.toUpperCase();
+    console.log(converted);
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
index dcc2bdb0..a535c256 100644
--- a/2-mandatory/1-weather-report.js
+++ b/2-mandatory/1-weather-report.js
@@ -11,10 +11,20 @@
         - Hint: you can call the temperatureService function from your function
 */
 
+cities1 = ['London', 'Paris','Barcelona','Dubai','Mumbai', 'São Paulo','Lagos'];
+
 function getTemperatureReport(cities) {
     // TODO
+    let arr = [];
+    for (let item of cities) {
+        let temp = temperatureService(item);
+        arr.push (`The temperature in ${item} is ${temp} degrees`); 
+    }
+    return arr;
 }
 
+getTemperatureReport(cities1);
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
index 10aab37d..ab491e9c 100644
--- a/2-mandatory/2-retrying-random-numbers.js
+++ b/2-mandatory/2-retrying-random-numbers.js
@@ -5,20 +5,26 @@
 
 // This function shouldn't be changed
 function generateRandomNumber() {
-    console.log("Generating number...");
-    return Math.round(Math.random() * 100);
+  console.log("Generating number...");
+  return Math.round(Math.random() * 100);
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+  // TODO - implement using a do-while loop
+  let result = 0;
+  do {
+    result = generateRandomNumber();
+  } while (result <= 50);
+
+  return result;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("Returned value should always be greater than 50", () => {
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
-    expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
+  expect(getRandomNumberGreaterThan50()).toBeGreaterThan(50);
 });
diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
index 2ce6fb73..46053ee7 100644
--- a/2-mandatory/3-financial-times.js
+++ b/2-mandatory/3-financial-times.js
@@ -5,7 +5,17 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+  let fitTitleArr = [];
+  if (allArticleTitles == null) {
+    return fitTitleArr;
+  }
+  for (let title of allArticleTitles) {
+    if (title.length <= 65) {
+      fitTitleArr.push(title);
+    }
+  }
+  return fitTitleArr;
+  // TODO
 }
 
 /*
@@ -14,7 +24,15 @@ function potentialHeadlines(allArticleTitles) {
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
-    // TODO
+  let countArr = [];
+  for (let title of allArticleTitles) {
+    let titleArr = title.split(" ");
+    countArr.push(titleArr);
+  }
+  let result = countArr.sort((a, b) => a.length - b.length)[0];
+  return result.join(" ");
+
+  // TODO
 }
 
 /*
@@ -23,7 +41,15 @@ function titleWithFewestWords(allArticleTitles) {
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
-    // TODO
+  // TODO
+  let numTitleArr = [];
+  let conditions = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "0"];
+  for (let title of allArticleTitles) {
+    if (conditions.some((el) => title.includes(el))) {
+      numTitleArr.push(title);
+    }
+  }
+  return numTitleArr;
 }
 
 /*
@@ -31,51 +57,63 @@ function headlinesWithNumbers(allArticleTitles) {
     Implement the function below to return this number - rounded to the nearest integer.
 */
 function averageNumberOfCharacters(allArticleTitles) {
-    // TODO
+  // TODO
+  let sum = 0;
+  let totalOfArticle = allArticleTitles.length;
+  for (let item of allArticleTitles) {
+    let strLength = item.length;
+    sum += strLength;
+  }
+  let average = sum / totalOfArticle;
+  return Math.round(average);
 }
 
-
-
 /* ======= List of Articles - DO NOT MODIFY ===== */
 const ARTICLE_TITLES = [
-    "Streaming wars drive media groups to spend more than $100bn on new content",
-    "Amazon Prime Video India country head: streaming is driving a TV revolution",
-    "Aerospace chiefs prepare for bumpy ride in recovery of long-haul flights",
-    "British companies look to muscle in on US retail investing boom",
-    "Libor to take firm step towards oblivion on New Year's Day",
-    "Audit profession unattractive to new recruits, says PwC boss",
-    "Chinese social media users blast Elon Musk over near miss in space",
-    "Companies raise over $12tn in 'blockbuster' year for global capital markets",
-    "The three questions that dominate investment",
-    "Brussels urges Chile's incoming president to endorse EU trade deal",
+  "Streaming wars drive media groups to spend more than $100bn on new content",
+  "Amazon Prime Video India country head: streaming is driving a TV revolution",
+  "Aerospace chiefs prepare for bumpy ride in recovery of long-haul flights",
+  "British companies look to muscle in on US retail investing boom",
+  "Libor to take firm step towards oblivion on New Year's Day",
+  "Audit profession unattractive to new recruits, says PwC boss",
+  "Chinese social media users blast Elon Musk over near miss in space",
+  "Companies raise over $12tn in 'blockbuster' year for global capital markets",
+  "The three questions that dominate investment",
+  "Brussels urges Chile's incoming president to endorse EU trade deal",
 ];
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("should only return potential headlines", () => {
-    expect(new Set(potentialHeadlines(ARTICLE_TITLES))).toEqual(new Set([
-        "British companies look to muscle in on US retail investing boom",
-        "Libor to take firm step towards oblivion on New Year's Day",
-        "Audit profession unattractive to new recruits, says PwC boss",
-        "The three questions that dominate investment"
-    ]));
+  expect(new Set(potentialHeadlines(ARTICLE_TITLES))).toEqual(
+    new Set([
+      "British companies look to muscle in on US retail investing boom",
+      "Libor to take firm step towards oblivion on New Year's Day",
+      "Audit profession unattractive to new recruits, says PwC boss",
+      "The three questions that dominate investment",
+    ])
+  );
 });
 
 test("should return an empty array for empty input", () => {
-    expect(potentialHeadlines([])).toEqual([]);
+  expect(potentialHeadlines([])).toEqual([]);
 });
 
 test("should return the title with the fewest words", () => {
-    expect(titleWithFewestWords(ARTICLE_TITLES)).toEqual("The three questions that dominate investment");
+  expect(titleWithFewestWords(ARTICLE_TITLES)).toEqual(
+    "The three questions that dominate investment"
+  );
 });
 
 test("should only return headlines containing numbers", () => {
-    expect(new Set(headlinesWithNumbers(ARTICLE_TITLES))).toEqual(new Set([
-        "Streaming wars drive media groups to spend more than $100bn on new content",
-        "Companies raise over $12tn in 'blockbuster' year for global capital markets"
-    ]));
+  expect(new Set(headlinesWithNumbers(ARTICLE_TITLES))).toEqual(
+    new Set([
+      "Streaming wars drive media groups to spend more than $100bn on new content",
+      "Companies raise over $12tn in 'blockbuster' year for global capital markets",
+    ])
+  );
 });
 
 test("should return the average number of characters in a headline", () => {
-    expect(averageNumberOfCharacters(ARTICLE_TITLES)).toEqual(65);
+  expect(averageNumberOfCharacters(ARTICLE_TITLES)).toEqual(65);
 });
diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
index 72d62f94..267844fc 100644
--- a/2-mandatory/4-stocks.js
+++ b/2-mandatory/4-stocks.js
@@ -11,11 +11,11 @@
 const STOCKS = ["aapl", "msft", "amzn", "googl", "tsla"];
 
 const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
-    [179.19, 180.33, 176.28, 175.64, 172.99], // AAPL
-    [340.69, 342.45, 334.69, 333.20, 327.29], // MSFT
-    [3384.44, 3393.39, 3421.37, 3420.74, 3408.34], // AMZN
-    [2951.88, 2958.13, 2938.33, 2928.30, 2869.45], // GOOGL
-    [1101.30, 1093.94, 1067.00, 1008.87, 938.53] // TSLA
+  [179.19, 180.33, 176.28, 175.64, 172.99], // AAPL
+  [340.69, 342.45, 334.69, 333.2, 327.29], // MSFT
+  [3384.44, 3393.39, 3421.37, 3420.74, 3408.34], // AMZN
+  [2951.88, 2958.13, 2938.33, 2928.3, 2869.45], // GOOGL
+  [1101.30, 1093.94, 1067.0, 1008.87, 938.53], // TSLA
 ];
 
 /*
@@ -34,7 +34,18 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+  // TODO
+  let averageOfStock = [];
+  let sum = 0;
+  for (let item of closingPricesForAllStocks) {
+    for (let element of item) {
+      sum += element;
+    }
+    let average = sum / 5;
+    averageOfStock.push(parseFloat(average.toFixed(2)));
+    sum = 0;
+  }
+  return averageOfStock;
 }
 
 /*
@@ -48,7 +59,15 @@ function getAveragePrices(closingPricesForAllStocks) {
     The price change value should be rounded to 2 decimal places, and should be a number (not a string)
 */
 function getPriceChanges(closingPricesForAllStocks) {
-    // TODO
+  // TODO
+  let priceChangeOfStock = [];
+  for (let item of closingPricesForAllStocks) {
+    let priceChange = item[4] - item[0];
+    let formattedPriceChange = parseFloat(priceChange.toFixed(2));
+    priceChangeOfStock.push(formattedPriceChange);
+    priceChange = 0;
+  }
+  return priceChangeOfStock;
 }
 
 /*
@@ -64,31 +83,58 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
-}
+  // TODO
+  let highestOfStock = [];
+  let stockName = [];
+  let describingArr = [];
+
+  for (let item of closingPricesForAllStocks) {
+    let maxPrice = 0;
+    for (let price of item) {
+      if (price > maxPrice) {
+        maxPrice = price;
+      }
+    }
+
+    highestOfStock.push(maxPrice.toFixed(2));
+    //highestOfStock.push(Math.max.apply(null,item));   --> OK
+    // Math.max(array) --> not supported in the current version (will return NaN)
+  }
 
+  for (let element of stocks) {
+    stockName.push(element.toUpperCase());
+  }
+
+  for (let i = 0; i < 5; i++) {
+    let sentence = `The highest price of ${stockName[i]} in the last 5 days was ${highestOfStock[i]}`;
+    describingArr.push(sentence);
+  }
+
+  return describingArr;
+}
 
-/* ======= TESTS - DO NOT MODIFY ===== */
+highestPriceDescriptions(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS, STOCKS);
+// /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the average price for each stock", () => {
-    expect(getAveragePrices(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual(
-        [176.89, 335.66, 3405.66, 2929.22, 1041.93]
-    );
+  expect(getAveragePrices(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual([
+    176.89, 335.66, 3405.66, 2929.22, 1041.93,
+  ]);
 });
 
 test("should return the price change for each stock", () => {
-    expect(getPriceChanges(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual(
-        [-6.2, -13.4, 23.9, -82.43, -162.77]
-    );
+  expect(getPriceChanges(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS)).toEqual([
+    -6.2, -13.4, 23.9, -82.43, -162.77,
+  ]);
 });
 
 test("should return a description of the highest price for each stock", () => {
-    expect(highestPriceDescriptions(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS, STOCKS)).toEqual(
-        [
-            "The highest price of AAPL in the last 5 days was 180.33",
-            "The highest price of MSFT in the last 5 days was 342.45",
-            "The highest price of AMZN in the last 5 days was 3421.37",
-            "The highest price of GOOGL in the last 5 days was 2958.13",
-            "The highest price of TSLA in the last 5 days was 1101.30"
-        ]
-    );
+  expect(
+    highestPriceDescriptions(CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS, STOCKS)
+  ).toEqual([
+    "The highest price of AAPL in the last 5 days was 180.33",
+    "The highest price of MSFT in the last 5 days was 342.45",
+    "The highest price of AMZN in the last 5 days was 3421.37",
+    "The highest price of GOOGL in the last 5 days was 2958.13",
+    "The highest price of TSLA in the last 5 days was 1101.30",
+  ]);
 });
diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
index 31f8052c..f58acd06 100644
--- a/3-extra/1-factorial.js
+++ b/3-extra/1-factorial.js
@@ -9,19 +9,26 @@
 */
 
 function factorial(input) {
-    // TODO
+  // TODO
+  let counter = 1;
+  let product = 1;
+  while (counter <= input) {
+    product *= counter;
+    counter++;
+  }
+  return product;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("3! should be 6", () => {
-    expect(factorial(3)).toEqual(6);
+  expect(factorial(3)).toEqual(6);
 });
 
 test("5! should be 120", () => {
-    expect(factorial(5)).toEqual(120);
+  expect(factorial(5)).toEqual(120);
 });
 
 test("10! should be 3628800", () => {
-    expect(factorial(10)).toEqual(3628800);
+  expect(factorial(10)).toEqual(3628800);
 });
diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
index ee57960f..3138d361 100644
--- a/3-extra/2-array-of-objects.js
+++ b/3-extra/2-array-of-objects.js
@@ -11,72 +11,97 @@
 */
 
 function getHighestRatedInEachGenre(books) {
-    // TODO
-}
+  let resultBooks = {};
+  let genres = [];
+  let result = [];
 
+  for (let i = 0; i < books.length; i++) {
+    let genre = books[i]["genre"];
+    if (genres.indexOf(genre) < 0) {
+      genres.push(genre);
+    }
+    
+    if (
+      !resultBooks[genre] ||
+      !resultBooks[genre]["rating"] ||
+      resultBooks[genre]["rating"] < books[i]["rating"]
+    ) {
+      resultBooks[genre] = books[i];
+    }
+  }
+  for (let i = 0; i < genres.length; i++) {
+    result.push(resultBooks[genres[i]]["title"]);
+  }
+
+  return result;
+  // TODO
+}
 
 /* ======= Book data - DO NOT MODIFY ===== */
 const BOOKS = [
-    {
-        title: "The Lion, the Witch and the Wardrobe",
-        genre: "children",
-        rating: 4.7
-    },
-    {
-        title: "Sapiens: A Brief History of Humankind",
-        genre: "non-fiction",
-        rating: 4.7
-    },
-    {
-        title: "Nadiya's Fast Flavours",
-        genre: "cooking",
-        rating: 4.7
-    },
-    {
-        title: "Harry Potter and the Philosopher's Stone",
-        genre: "children",
-        rating: 4.8
-    },
-    {
-        title: "A Life on Our Planet",
-        genre: "non-fiction",
-        rating: 4.8
-    },
-    {
-        title: "Dishoom: The first ever cookbook from the much-loved Indian restaurant",
-        genre: "cooking",
-        rating: 4.85
-    },
-    {
-        title: "Gangsta Granny Strikes Again!",
-        genre: "children",
-        rating: 4.9
-    },
-    {
-        title: "Diary of a Wimpy Kid",
-        genre: "children",
-        rating: 4.6
-    },
-    {
-        title: "BOSH!: Simple recipes. Unbelievable results. All plants.",
-        genre: "cooking",
-        rating: 4.6
-    },
-    {
-        title: "The Book Your Dog Wishes You Would Read",
-        genre: "non-fiction",
-        rating: 4.85
-    },
-]
+  {
+    title: "The Lion, the Witch and the Wardrobe",
+    genre: "children",
+    rating: 4.7,
+  },
+  {
+    title: "Sapiens: A Brief History of Humankind",
+    genre: "non-fiction",
+    rating: 4.7,
+  },
+  {
+    title: "Nadiya's Fast Flavours",
+    genre: "cooking",
+    rating: 4.7,
+  },
+  {
+    title: "Harry Potter and the Philosopher's Stone",
+    genre: "children",
+    rating: 4.8,
+  },
+  {
+    title: "A Life on Our Planet",
+    genre: "non-fiction",
+    rating: 4.8,
+  },
+  {
+    title:
+      "Dishoom: The first ever cookbook from the much-loved Indian restaurant",
+    genre: "cooking",
+    rating: 4.85,
+  },
+  {
+    title: "Gangsta Granny Strikes Again!",
+    genre: "children",
+    rating: 4.9,
+  },
+  {
+    title: "Diary of a Wimpy Kid",
+    genre: "children",
+    rating: 4.6,
+  },
+  {
+    title: "BOSH!: Simple recipes. Unbelievable results. All plants.",
+    genre: "cooking",
+    rating: 4.6,
+  },
+  {
+    title: "The Book Your Dog Wishes You Would Read",
+    genre: "non-fiction",
+    rating: 4.85,
+  },
+];
+
+console.log(getHighestRatedInEachGenre(BOOKS));
 
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 test("should return the highest rated book in each genre", () => {
-    expect(new Set(getHighestRatedInEachGenre(BOOKS))).toEqual(new Set(
-        [
-            "The Book Your Dog Wishes You Would Read",
-            "Gangsta Granny Strikes Again!",
-            "Dishoom: The first ever cookbook from the much-loved Indian restaurant"
-        ]
-    ));
-});
\ No newline at end of file
+  expect(new Set(getHighestRatedInEachGenre(BOOKS))).toEqual(
+    new Set([
+      "The Book Your Dog Wishes You Would Read",
+      "Gangsta Granny Strikes Again!",
+      "Dishoom: The first ever cookbook from the much-loved Indian restaurant",
+    ])
+  );
+});
diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
index 9ef9aec7..cefa58f1 100644
--- a/3-extra/3-fibonacci.js
+++ b/3-extra/3-fibonacci.js
@@ -14,7 +14,18 @@
 */
 
 function generateFibonacciSequence(n) {
-    // TODO
+  let resultArr = [];
+  for (i = 0; i <n; i++) {
+    if (i === 0) {
+      resultArr.push(0);
+    } else if (i === 1 || i === 2) {
+      resultArr.push(1);
+    } else {
+      let value = resultArr[i - 1] + resultArr[i - 2];
+      resultArr.push(value);
+    }
+  }
+  return resultArr;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/package.json b/package.json
index dc4e9ace..46d8acaa 100644
--- a/package.json
+++ b/package.json
@@ -23,5 +23,8 @@
   "homepage": "https://github.com/CodeYourFuture/JavaScript-Core-1-Coursework-Week3#readme",
   "devDependencies": {
     "jest": "^26.6.3"
+  },
+  "dependencies": {
+    "node": "^18.9.0"
   }
 }