diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
index 0acfc78d..9bdf8e9b 100644
--- a/1-exercises/A-undefined/exercise.js
+++ b/1-exercises/A-undefined/exercise.js
@@ -11,12 +11,17 @@
 
 // Example 1
 let a;
+// the variable a has not given a value()
+// a = "Thank you for checking my work"
 console.log(a);
 
 
 // Example 2
 function sayHello() {
-    let message = "Hello";
+  let message = "Hello";
+  /*the variable message is not called on the second line
+  example */
+  //   return message;
 }
 
 let hello = sayHello();
@@ -27,10 +32,13 @@ console.log(hello);
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
-
+// user doesn't have values in it
 sayHelloToUser();
+// sayHelloToUser("my friend");
 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// console.log(arr[2])
+//On the console have selected a number in the array which doesn't exit. javascript counts starting from 0  
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
index b459888f..63beccd5 100644
--- a/1-exercises/B-while-loop/exercise.js
+++ b/1-exercises/B-while-loop/exercise.js
@@ -7,6 +7,18 @@
 
 function evenNumbers(n) {
     // TODO
+    i = 0;
+    y = n;
+    let x = "";
+    if (n > 0) {
+      while (i < y) {
+        x += i + ",";
+        i += 2;
+      }
+      console.log(x);
+    } else {
+      //   console.log("nothing");
+    }
 }
 
 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..e140d22e 100644
--- a/1-exercises/C-while-loop-with-array/exercise.js
+++ b/1-exercises/C-while-loop-with-array/exercise.js
@@ -17,7 +17,14 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+  // TODO
+  let capture = "";
+  for (let i = 0; i < birthdays.length; i += 6) {
+    const index = birthdays[i];
+    index;
+    capture += index;
+    console.log(index);
+  }
 }
 
-console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
+// 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..f62477ed 100644
--- a/1-exercises/D-do-while/exercise.js
+++ b/1-exercises/D-do-while/exercise.js
@@ -8,6 +8,14 @@
 
 function evenNumbersSum(n) {
     // TODO
+    let i = 0;
+    let message = "Total";
+    let capture = "";
+    do {
+      let sum = message + capture[i];
+      console.log(sum);
+      i * 2;
+    } while (i < n);
 }
 
 console.log(evenNumbersSum(3)); // should output 6
diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
index db5fac64..bd6f7191 100644
--- a/1-exercises/E-for-loop/exercise1.js
+++ b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,12 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
-    console.log(String.fromCharCode(97 + i));
-    i++;
+// let i = 0;
+// while(i < 26) {
+//     console.log(String.fromCharCode(97 + i));
+//     i++;
+// }
+for (let i = 0; i < 29; i++) {
+  console.log(String.fromCharCode(94 + 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..2e425fa3 100644
--- a/1-exercises/E-for-loop/exercise2.js
+++ b/1-exercises/E-for-loop/exercise2.js
@@ -27,6 +27,18 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
+let capture = "";
+for (let i = 0; i < WRITERS.length; i++) {
+    const name = WRITERS[i]
+    const age = AGES[i]
+    console.log(name, age, "years old")
+}
+// for (var i in WRITERS) {
+//   for (var a in AGES) {
+//     capture += WRITERS[i] + AGES[a];
+//     console.log(capture);
+//   }
+// }
 
 /*
 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..a191f60d 100644
--- a/1-exercises/F-for-of-loop/exercise.js
+++ b/1-exercises/F-for-of-loop/exercise.js
@@ -12,5 +12,19 @@ let tubeStations = [
 ];
 
 
-// TODO Use a for-of loop to capitalise and output each letter in the string seperately.
+// TODO Use a for-of loop to capitalize and output each letter in the string seperately.
 let str = "codeyourfuture";
+
+// TODO 1
+for (let i = 0; i < tubeStations.length; i++) {
+const index = tubeStations[i];
+console.log(index);
+}
+
+// TODO 2
+let capture = ""
+for (let i = 0; i < str.length;  i++) {
+    capture += str[i];
+}
+
+console.log(capture.toUpperCase());
\ No newline at end of file
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
index dcc2bdb0..04c0cc68 100644
--- a/2-mandatory/1-weather-report.js
+++ b/2-mandatory/1-weather-report.js
@@ -12,7 +12,13 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+  // TODO
+  let temperature = [];
+  for (city of cities) {
+    let temp = temperatureService(city);
+    temperature.push("The temperature in", city, " is ", temp, " degrees");
+  }
+  return temperature;
 }
 
 
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
index 10aab37d..1bd31b6e 100644
--- a/2-mandatory/2-retrying-random-numbers.js
+++ b/2-mandatory/2-retrying-random-numbers.js
@@ -11,6 +11,11 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    i = 0;
+    do {
+      i += generateRandomNumber();
+    } while (i < 50);
+    return i;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
index 2ce6fb73..ad2b9a54 100644
--- a/2-mandatory/3-financial-times.js
+++ b/2-mandatory/3-financial-times.js
@@ -6,25 +6,36 @@
 */
 function potentialHeadlines(allArticleTitles) {
     // TODO
+    const article = allArticleTitles.filter((article) => article.length <= 65);
+    return article;
 }
 
 /*
     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
+  // TODO
+  const outputOfArticle = allArticleTitles[0];
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    if (
+      allArticleTitles[i].split(" ").length < outputOfArticle.split(" ").length
+    )
+      outputOfArticle = allArticleTitles[i];
+  }
+  return outputOfArticle;
 }
 
 /*
-    The editor of the FT has realised that headlines which have numbers in them get more clicks!
+    The editor of the FT has realized that headlines which have numbers in them get more clicks!
     Implement the function below to return a new array containing all the headlines which contain a number.
     (Hint: remember that you can also loop through the characters of a string if you need to)
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
-}
+    const title = allArticleTitles.filter((article) => article.match(/(\d+)/));
+    return title
 
 /*
     The Financial Times wants to understand what the average number of characters in an article title is.
@@ -32,6 +43,12 @@ function headlinesWithNumbers(allArticleTitles) {
 */
 function averageNumberOfCharacters(allArticleTitles) {
     // TODO
+    const total = 0;
+    for (let title of allArticleTitles) {
+      total += title.length;
+    }
+    let average = total / allArticleTitles.length;
+    return Math.round(average);
 }
 
 
diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
index 72d62f94..7e7420df 100644
--- a/2-mandatory/4-stocks.js
+++ b/2-mandatory/4-stocks.js
@@ -34,9 +34,14 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
         Functions can help with this!
 */
 function getAveragePrices(closingPricesForAllStocks) {
-    // TODO
+  // TODO
+  return closingPricesForAllStocks.map((priceArr) => {
+    return Number(
+      (priceArr.reduce((tot, num) => tot + num) / priceArr.length).toFixed(2)
+    );
+  });
 }
-
+    
 /*
     We also want to see what the change in price is from the first day to the last day for each stock.
     Implement the below function, which
@@ -49,6 +54,9 @@ function getAveragePrices(closingPricesForAllStocks) {
 */
 function getPriceChanges(closingPricesForAllStocks) {
     // TODO
+    return closingPricesForAllStocks.map((priceArr) => {
+      return Number((priceArr[priceArr.length - 1] - priceArr[0]).toFixed(2));
+    });
 }
 
 /*