diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index 0f97fe4..f2a4c20 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -11,35 +11,67 @@ public class Exercise {
 
     public void stepOne() {
         // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
+        int[] arr = new int[4];
 
+        for (int i = 0; i <= 3 ; i++) {
+            arr[i] = i;
+
+        }
+        this.numsZeroToThree = arr;
 
     }
 
     public void stepTwo() {
         // TODO: 2. Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array
+        int[] arr = new int[6];
+
+        for (int i = 5; i <= 10 ; i++) {
+            arr[i-5] = i;
 
+        }
+        this.numsFiveToTen = arr;
 
     }
 
     public void stepThree() {
         // TODO: 3. Write a for loop that adds the numbers 3 to 0 (in that order) to the countdown array
+        int[] arr = new int[4];
+        int num=3;
+        for (int i = 0; i <= 3 ; i++) {
+            arr[i] = num;
+            num--;
 
+        }
+        this.countdown = arr;
 
     }
 
     public boolean stepFour(int num) {
         // TODO: 6. Write a for loop that checks if num is in the favouriteNumbers array
+        int numberIn=0;
+        boolean favNumberInArray =false;
+        for (int i = 0; i <= favouriteNumbers.length-1 ; i++) {
+            numberIn=favouriteNumbers[i];
+            if (numberIn==num)favNumberInArray=true;
+
+        }
+       return favNumberInArray;
 
 
 
-        return false;
     }
 
     public boolean stepFive(String hobby) {
         // TODO 5. Write a for loop that checks if the hobby String is in the myHobbies array
+        String stringIn="";
+        boolean hobbyIn =false;
+        for (int i = 0; i <= myHobbies.length-1 ; i++) {
+            stringIn=myHobbies[i];
+            if (stringIn.equals(hobby))hobbyIn=true;
 
+        }
+        return hobbyIn;
 
 
-        return false;
     }
 }
diff --git a/src/main/java/com/booleanuk/extension/Extension.java b/src/main/java/com/booleanuk/extension/Extension.java
index 8b9d4a6..0d51489 100644
--- a/src/main/java/com/booleanuk/extension/Extension.java
+++ b/src/main/java/com/booleanuk/extension/Extension.java
@@ -5,7 +5,13 @@ 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
-
+        int[] arr = new int[4];
+        int count=0;
+        for (int i = 0; i <= 3 ; i++) {
+            arr[i] = count;
+            count += 2;
+        }
+        this.numsEven = arr;
 
         
     }