diff --git a/1-exercises/B-array-literals/exercise.js b/1-exercises/B-array-literals/exercise.js
index 51eba5cc..0062c63b 100644
--- a/1-exercises/B-array-literals/exercise.js
+++ b/1-exercises/B-array-literals/exercise.js
@@ -4,8 +4,8 @@
   Declare some variables assigned to arrays of values
 */
 
-let numbers = []; // add numbers from 1 to 10 into this array
-let mentors; // Create an array with the names of the mentors: Daniel, Irina and Rares
+let numbers = [1,2,3,4,5,6,7,8,9,10]; // add numbers from 1 to 10 into this array
+let mentors = ["Daniel", "Irina", "Rares"]; // Create an array with the names of the mentors: Daniel, Irina and Rares
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/1-exercises/C-array-get-set/exercise.js b/1-exercises/C-array-get-set/exercise.js
index 5ca911d5..3e97995e 100644
--- a/1-exercises/C-array-get-set/exercise.js
+++ b/1-exercises/C-array-get-set/exercise.js
@@ -5,11 +5,11 @@
 */
 
 function first(arr) {
-  return; // complete this statement
+  return arr[0]; // complete this statement
 }
 
 function last(arr) {
-  return; // complete this statement
+  return arr[arr.length -1]; // complete this statement
 }
 
 /* 
diff --git a/1-exercises/C-array-get-set/exercises2.js b/1-exercises/C-array-get-set/exercises2.js
index 6b6b007a..36d9c411 100644
--- a/1-exercises/C-array-get-set/exercises2.js
+++ b/1-exercises/C-array-get-set/exercises2.js
@@ -7,7 +7,7 @@
 */
 
 let numbers = [1, 2, 3]; // Don't change this array literal declaration
-
+numbers.push(4);
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */
diff --git a/1-exercises/D-for-loop/exercise.js b/1-exercises/D-for-loop/exercise.js
index 081002b2..1809a952 100644
--- a/1-exercises/D-for-loop/exercise.js
+++ b/1-exercises/D-for-loop/exercise.js
@@ -25,7 +25,9 @@ const AGES = [
     63,
     49
 ];
-
+for (let i = 0; i < WRITERS.length; i++) {
+    console.log(`${WRITERS[i]} is ${AGES[i]} years old`);
+}
 // TODO - Write for loop code here
 
 /*
diff --git a/1-exercises/E-while-loop-with-array/exercise.js b/1-exercises/E-while-loop-with-array/exercise.js
index d584cd75..880a4591 100644
--- a/1-exercises/E-while-loop-with-array/exercise.js
+++ b/1-exercises/E-while-loop-with-array/exercise.js
@@ -18,6 +18,14 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+    let i = 0;
+    while (i < birthdays.length) {
+        const birthday = birthdays[i];
+        if (birthday.includes("July")) {
+            return birthday;
+        }
+        i++;
+    }
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
index dcc2bdb0..93d69a40 100644
--- a/2-mandatory/1-weather-report.js
+++ b/2-mandatory/1-weather-report.js
@@ -13,6 +13,15 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    const temperatureReport = [];
+
+    for(let i = 0; i < cities.length; i++) {
+        const temperature = temperatureService(cities[i]);
+        
+        temperatureReport.push(`The temperature in ${cities[i]} is ${temperature} degrees`);
+    }
+    
+    return temperatureReport;
 }
 
 
diff --git a/2-mandatory/2-financial-times.js b/2-mandatory/2-financial-times.js
index 2ce6fb73..867832d0 100644
--- a/2-mandatory/2-financial-times.js
+++ b/2-mandatory/2-financial-times.js
@@ -6,15 +6,26 @@
 */
 function potentialHeadlines(allArticleTitles) {
     // TODO
+    const headTitle = allArticleTitles.filter(title => title.length < 65);
+    return headTitle;
 }
 
 /*
     The editor of the FT likes short headlines with only a few words!
     Implement the function below, which returns the title with the fewest words.
-    (you can assume words will always be seperated by a space)
+    (you can assume words will always be separated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
     // TODO
+    let shortestTitle = allArticleTitles[0];
+   
+    for (let i = 0; i < allArticleTitles.length; i++) {
+        const currentTitle = allArticleTitles[i];
+        if (currentTitle.length < shortestTitle.length) {
+            shortestTitle = currentTitle  
+        }
+    }
+    return shortestTitle;
 }
 
 /*
@@ -24,6 +35,7 @@ function titleWithFewestWords(allArticleTitles) {
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
+    return allArticleTitles.filter(title => /\d/.test(title));
 }
 
 /*
@@ -32,6 +44,9 @@ function headlinesWithNumbers(allArticleTitles) {
 */
 function averageNumberOfCharacters(allArticleTitles) {
     // TODO
+    const articleSum = allArticleTitles.reduce((acc, val) => acc + val.length, 0);
+    return Math.round(articleSum / allArticleTitles.length)
+    
 }
 
 
diff --git a/2-mandatory/3-stocks.js b/2-mandatory/3-stocks.js
index 72d62f94..768cde34 100644
--- a/2-mandatory/3-stocks.js
+++ b/2-mandatory/3-stocks.js
@@ -35,6 +35,14 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
 */
 function getAveragePrices(closingPricesForAllStocks) {
     // TODO
+    let currentStock = [];
+    for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+        const numberOfStocks = closingPricesForAllStocks[i].length;
+        const sumOfCurrentStock = closingPricesForAllStocks[i].reduce((accumulator, currentValue) => accumulator + currentValue, 0);
+        const roundedStock = Math.round((sumOfCurrentStock / numberOfStocks) * 100) / 100;
+        currentStock.push(roundedStock);
+    }
+    return currentStock;
 }
 
 /*
@@ -49,6 +57,17 @@ function getAveragePrices(closingPricesForAllStocks) {
 */
 function getPriceChanges(closingPricesForAllStocks) {
     // TODO
+    let closingPrices = [];
+
+    for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+        const numberOfPrices = closingPricesForAllStocks[i].length - 1;
+        const firstDay = closingPricesForAllStocks[i].at(0);
+        const lastDay = closingPricesForAllStocks[i].at(numberOfPrices);
+        const priceChange = Math.round((lastDay - firstDay) * 100) / 100;
+       
+        closingPrices.push(priceChange);
+    }
+    return closingPrices;
 }
 
 /*
@@ -65,6 +84,17 @@ function getPriceChanges(closingPricesForAllStocks) {
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
     // TODO
+    let allHighestPrices = [];
+    for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+        const stockName = stocks[i].toUpperCase();
+        const stockPrices = closingPricesForAllStocks[i];
+        const highestPrice = Math.max(...stockPrices).toFixed(2);
+
+        allHighestPrices.push(`The highest price of ${stockName} in the last 5 days was ${highestPrice}`)
+
+    }
+
+    return allHighestPrices;
 }
 
 
diff --git a/3-extra/1-radio-stations.js b/3-extra/1-radio-stations.js
index 577076e9..8c244328 100644
--- a/3-extra/1-radio-stations.js
+++ b/3-extra/1-radio-stations.js
@@ -14,7 +14,16 @@
  */
 
 // `getAllFrequencies` goes here
+function getAllFrequencies() {
+  const allFrequencies = [
+    87, 88, 89, 90, 91, 92,
+    93, 94, 95, 96, 97, 98,
+    99, 100, 101, 102, 103,
+    104, 105, 106, 107, 108,
+  ]
 
+  return allFrequencies;
+}
 /**
  * Next, let's write a function that gives us only the frequencies that are radio stations.
  * Call this function `getStations`.
@@ -25,7 +34,11 @@
  * - Return only the frequencies that are radio stations.
  */
 // `getStations` goes here
-
+function getStations() {
+  const allFrequencies = getAllFrequencies();
+  const stations = allFrequencies.filter(isRadioStation);
+  return stations;
+}
 /*
  * ======= TESTS - DO NOT MODIFY =======
  * Note: You are not expected to understand everything below this comment!
diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
index ee57960f..b028ab7f 100644
--- a/3-extra/2-array-of-objects.js
+++ b/3-extra/2-array-of-objects.js
@@ -12,6 +12,18 @@
 
 function getHighestRatedInEachGenre(books) {
     // TODO
+    const highestRatedBooks = {};
+    for (const book of books) {
+        const { title, genre, rating } = book;
+    
+        if (highestRatedBooks[genre] === undefined || rating > highestRatedBooks[genre].rating) {
+            highestRatedBooks[genre] = { title, rating };
+        }
+      }
+      const highestRatedTitlesByGenre = Object.values(highestRatedBooks).map(book => book.title);
+      
+    return highestRatedTitlesByGenre;
+      
 }
 
 
diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
index 9ef9aec7..fac6f97b 100644
--- a/3-extra/3-fibonacci.js
+++ b/3-extra/3-fibonacci.js
@@ -15,6 +15,13 @@
 
 function generateFibonacciSequence(n) {
     // TODO
+    const sequence = [0, 1];
+    
+    for (let i = 2; i < n; i++) {
+        sequence.push(sequence[i - 1] + sequence[i - 2]);
+    }
+    
+    return sequence;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */