diff --git a/csharp-fundamentals-methods.Main/Core.cs b/csharp-fundamentals-methods.Main/Core.cs
index a69b542..07c4f99 100644
--- a/csharp-fundamentals-methods.Main/Core.cs
+++ b/csharp-fundamentals-methods.Main/Core.cs
@@ -27,7 +27,7 @@ logic. See the example below and take some time to break it down and understand
         //TODO: 1. Create a method that accepts a name and returns a greeting      
         public string greet(string name)
         {
-            throw new NotImplementedException();
+            return $"Hello {name}!";
         }
 
         //TODO: 2. Increment a number
@@ -36,7 +36,7 @@ Complete this method so that it increases the number given by 1 and returns the
          */
         public int increment(int number)
         {
-            throw new NotImplementedException();
+            return number + 1;
         }
 
         //TODO: 3. Construct a friendly greeting
@@ -50,7 +50,7 @@ Complete this method so that it accepts a name as an input and outputs a friendl
          */
         public string happilyGreet(string name)
         {
-            throw new NotImplementedException();
+            return $"Hi, {name} :)";
         }
 
 
@@ -70,7 +70,7 @@ Create a method named constructNumberArray that accepts two whole numbers named
         public int[] constructNumberArray(int lower, int upper)
         {
 
-            int[] resultArray = { };
+            int[] resultArray = Enumerable.Range(lower, upper-lower+1).ToArray();
 
             return resultArray;
 
@@ -92,7 +92,7 @@ The number of exclamation marks appended must be determined by the number provid
 
         public string shout(string phrase, int number)
         {
-            return $"";
+            return $"{phrase.ToUpper()}{new string('!', number)}";
         }
 
 
diff --git a/csharp-fundamentals-methods.Main/Extension.cs b/csharp-fundamentals-methods.Main/Extension.cs
index a4461e2..947d0b7 100644
--- a/csharp-fundamentals-methods.Main/Extension.cs
+++ b/csharp-fundamentals-methods.Main/Extension.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -17,9 +18,20 @@ public class Extension
         "The cake is still baking!" if there are any remaining minutes left,
         and "The timer finished ages ago!" if the remaining minutes is a negative number
      */
-        public double timerStatus(int v)
+        public string timerStatus(int v)
         {
-            throw new NotImplementedException();
+            switch (v)
+            {
+                case var expression when v > 0:
+                    return "The cake is still baking!";
+                    break;
+                case var expression when v < 0:
+                    return "The timer finished ages ago!";
+                    break;
+                default:
+                    return "The cake is ready!";
+            }
+
         }
 
 
@@ -35,7 +47,11 @@ provided and the prep time per ingredient.
 
         public double estimatePrepTime(string[] strings, int v)
         {
-            throw new NotImplementedException();
+            if (v > 0) {
+                return Convert.ToDouble(v * strings.Length);
+            } else {
+                return 2 * strings.Length;
+            }
         }
 
 
@@ -51,7 +67,11 @@ public double estimatePrepTime(string[] strings, int v)
 
         public double calculateGramsOfSugar(string[] strings, int v)
         {
-            throw new NotImplementedException();
+            if (strings.Contains("sugar")) {
+                return v * 100D;   
+            } else {
+                return 0;
+            }
         }