diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index 0f97fe4..bb1f3b0 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -11,24 +11,41 @@ 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];
+        for (int i = 5; i <= 10; i++) {
+            numsFiveToTen[i -5] = i;
+        }
+
 
 
     }
 
     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];
+        for (int i = 3; i >= 0; i--) {
+            countdown[3 - i] = i;
+        }
 
     }
 
     public boolean stepFour(int num) {
         // TODO: 6. Write a for loop that checks if num is in the favouriteNumbers array
+        for (int i: favouriteNumbers) {
+            if (i == num) {
+                return true;
+            }
+        }
 
 
 
@@ -37,6 +54,11 @@ 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 (String i: myHobbies) {
+            if (i.equals(hobby)) {
+                return true;
+            }
+        }
 
 
 
diff --git a/src/main/java/com/booleanuk/extension/Extension.java b/src/main/java/com/booleanuk/extension/Extension.java
index 8b9d4a6..bdedd94 100644
--- a/src/main/java/com/booleanuk/extension/Extension.java
+++ b/src/main/java/com/booleanuk/extension/Extension.java
@@ -5,6 +5,14 @@ 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 index = 0;
+        for (int i = 0; i <= 6; i++) {
+            if (i%2 == 0) {
+                numsEven[index++] = i;
+
+            }
+        }