diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
index 0acfc78d..0e1161e4 100644
--- a/1-exercises/A-undefined/exercise.js
+++ b/1-exercises/A-undefined/exercise.js
@@ -12,7 +12,7 @@
 // Example 1
 let a;
 console.log(a);
-
+// There is no value for variable a
 
 // Example 2
 function sayHello() {
@@ -21,7 +21,7 @@ function sayHello() {
 
 let hello = sayHello();
 console.log(hello);
-
+//There is no return in function sayHello()
 
 // Example 3
 function sayHelloToUser(user) {
@@ -29,8 +29,10 @@ function sayHelloToUser(user) {
 }
 
 sayHelloToUser();
+//function sayHelloToUser needs an input called user
 
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// array arr doesn't have index 3
\ No newline at end of file
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
index b459888f..f638d744 100644
--- a/1-exercises/B-while-loop/exercise.js
+++ b/1-exercises/B-while-loop/exercise.js
@@ -7,6 +7,14 @@
 
 function evenNumbers(n) {
     // TODO
+    let i = 0
+    const arr = []
+while (i < n && n > 0){
+    arr.push(i * 2)
+    console.log(arr[i])
+    i++
+}
+return arr.join(',')
 }
 
 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..a611b52c 100644
--- a/1-exercises/C-while-loop-with-array/exercise.js
+++ b/1-exercises/C-while-loop-with-array/exercise.js
@@ -18,6 +18,8 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+    const findFirstJulyBDay = birthdays.filter((bDay) => bDay.startWith("July"))
+    return findFirstJulyBDay[0]
 }
 
 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..1dfd0f32 100644
--- a/1-exercises/D-do-while/exercise.js
+++ b/1-exercises/D-do-while/exercise.js
@@ -8,6 +8,17 @@
 
 function evenNumbersSum(n) {
     // TODO
+    if (n == 0) return 0
+    let i = 0
+    j = 1
+    sum = 0
+    do {
+        i += 2
+        sum += i
+        j ++ 
+    }
+    while(j < n) 
+    return sum 
 }
 
 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..b8bd470d 100644
--- a/1-exercises/E-for-loop/exercise1.js
+++ b/1-exercises/E-for-loop/exercise1.js
@@ -7,7 +7,7 @@
 
 // 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++;
 }
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
index 081002b2..4a96c1ea 100644
--- a/1-exercises/E-for-loop/exercise2.js
+++ b/1-exercises/E-for-loop/exercise2.js
@@ -27,7 +27,9 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
-
+for (let i = 0; i < WRITERS.length; i++){
+    console.log(WRITERS[i]+ ' is ' + AGES[i] + ' 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..d7c0721b 100644
--- a/1-exercises/F-for-of-loop/exercise.js
+++ b/1-exercises/F-for-of-loop/exercise.js
@@ -10,7 +10,11 @@ let tubeStations = [
     "Oxford Street",
     "Tottenham Court Road"
 ];
-
-
+for (let i = 0; i < tubeStations.length; i++){
+console.log(tubeStations[i]);
+}
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+for (let i = 0; i < str.length; i++){
+console.log(str[i].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..f4e3d727 100644
--- a/2-mandatory/1-weather-report.js
+++ b/2-mandatory/1-weather-report.js
@@ -13,6 +13,12 @@
 
 function getTemperatureReport(cities) {
     // TODO
+    let TemperatureReport = [i];
+    for (city of cities){
+        let cityTemp = temperatureService(city);
+        TemperatureReport.push('The temperature in ${city} is ${cityTemp} degrees');
+    }
+    return TemperatureReport;
 }
 
 
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
index 10aab37d..467aa6d1 100644
--- a/2-mandatory/2-retrying-random-numbers.js
+++ b/2-mandatory/2-retrying-random-numbers.js
@@ -11,6 +11,12 @@ function generateRandomNumber() {
 
 function getRandomNumberGreaterThan50() {
     // TODO - implement using a do-while loop
+    let x = 0
+    do {
+        x = generateRandomNumber()
+    }
+    while(x <= 50)
+    return x;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
index 2ce6fb73..8b97c7b9 100644
--- a/2-mandatory/3-financial-times.js
+++ b/2-mandatory/3-financial-times.js
@@ -6,6 +6,7 @@
 */
 function potentialHeadlines(allArticleTitles) {
     // TODO
+    return allArticleTitles.filter;
 }
 
 /*