diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index 0f97fe4..a554039 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -11,26 +11,47 @@ public class Exercise {
 
     public void stepOne() {
         // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
+        numsZeroToThree = new int[4];
+        for (int i = 0; i <= 3; i++){
+            numsZeroToThree[i] = i;
 
-
+        }
     }
 
     public void stepTwo() {
         // TODO: 2. Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array
 
+        numsFiveToTen = new int[6];
+        int count = 0;
+        for (int i = 5; i <= 10; i++) {
+            numsFiveToTen[count] = i;
+            count++;
+        }
 
     }
 
     public void stepThree() {
         // TODO: 3. Write a for loop that adds the numbers 3 to 0 (in that order) to the countdown array
 
+        countdown = new int[4];
+        int count = 0;
+        for (int i = 3; i >= 0; i--) {
+            countdown[count] = i;
+            count++;
+        }
 
     }
 
     public boolean stepFour(int num) {
         // TODO: 6. Write a for loop that checks if num is in the favouriteNumbers array
 
+        for (int i = 0; i < favouriteNumbers.length; i++) {
+            if (num == favouriteNumbers[i]){
+                return true;
+            }
+
 
+        }
 
         return false;
     }
@@ -38,7 +59,11 @@ public boolean stepFour(int num) {
     public boolean stepFive(String hobby) {
         // TODO 5. Write a for loop that checks if the hobby String is in the myHobbies array
 
-
+        for (int i = 0; i < myHobbies.length; i++) {
+            if (hobby == myHobbies[i]){
+                return true;
+            }
+        }
 
         return false;
     }
diff --git a/src/main/java/com/booleanuk/extension/Extension.java b/src/main/java/com/booleanuk/extension/Extension.java
index 8b9d4a6..8858777 100644
--- a/src/main/java/com/booleanuk/extension/Extension.java
+++ b/src/main/java/com/booleanuk/extension/Extension.java
@@ -6,6 +6,13 @@ public class Extension {
     public void stepOne() {
         // TODO: 1. Write a for loop that adds all the even numbers between 0 and 6 (0, 2, 4, 6) to evenNums
 
+        numsEven = new int[4];
+
+        int count = 0;
+        for (int i = 0; i <= 6; i = i+2) {
+            numsEven[count] = i;
+            count++;
+        }
 
         
     }