diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
index 0acfc78d..33a23be9 100644
--- a/1-exercises/A-undefined/exercise.js
+++ b/1-exercises/A-undefined/exercise.js
@@ -12,16 +12,18 @@
 // Example 1
 let a;
 console.log(a);
+// we have not assigned a value to 'a' e.g let a = "something"
 
 
 // Example 2
 function sayHello() {
     let message = "Hello";
+
 }
 
 let hello = sayHello();
 console.log(hello);
-
+// we needed a 'return message' inside the function
 
 // Example 3
 function sayHelloToUser(user) {
@@ -30,7 +32,10 @@ function sayHelloToUser(user) {
 
 sayHelloToUser();
 
+// you haven't given the function a parameter e.g "khadija"
+
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+// the index 3 does not exist in the given array but if we added an extra number e.g 4, it would no longer be undefined. 
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
index b459888f..c160cacb 100644
--- a/1-exercises/B-while-loop/exercise.js
+++ b/1-exercises/B-while-loop/exercise.js
@@ -6,9 +6,24 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+    // TODO '*' 
+if(n!== 0){
+    let i = 0;
+    let j = 0;
+    let array = [];
+    
+    while(i < n){
+     array.push(j); 
+    i++;
+    j = (j+2);
+    }
+    
+    console.log(array.toString());
+    }
 }
 
+
+
 evenNumbers(3); // should output 0,2,4
 evenNumbers(0); // should output nothing
 evenNumbers(10); // should output 0,2,4,6,8,10,12,14,16,18
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
index d584cd75..58efd727 100644
--- a/1-exercises/C-while-loop-with-array/exercise.js
+++ b/1-exercises/C-while-loop-with-array/exercise.js
@@ -18,6 +18,13 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+    let i = 0;
+    while (i < birthdays.length){
+        if (birthdays[i].includes("July")){
+            return birthdays[i];
+        }
+        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..7fc0b793 100644
--- a/2-mandatory/1-weather-report.js
+++ b/2-mandatory/1-weather-report.js
@@ -12,7 +12,13 @@
 */
 
 function getTemperatureReport(cities) {
-    // TODO
+    let cityWeather = [];
+  for (let i = 0; i < cities.length; i++) {
+    cityWeather.push(
+      `The temperature in ${cities[i]} is ${temperatureService(cities[i])} degrees`
+    );
+  }
+  return cityWeather;
 }
 
 
@@ -31,7 +37,7 @@ function temperatureService(city) {
     
     return temparatureMap.get(city);
 }
-
+temperatureService("London")
 test("should return a temperature report for the user's cities", () => {
     let usersCities = [
         "London",
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
index 10aab37d..0d0a1aca 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
+    let n;
+    do {
+        n = generateRandomNumber();
+    } while (n < 50)
+    return n
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
index 72d62f94..65a884ab 100644
--- a/2-mandatory/4-stocks.js
+++ b/2-mandatory/4-stocks.js
@@ -37,6 +37,7 @@ function getAveragePrices(closingPricesForAllStocks) {
     // TODO
 }
 
+
 /*
     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