diff --git a/Emne 3/UnitTesting/UnitTesting.Test/UnitTest1.cs b/Emne 3/UnitTesting/UnitTesting.Test/UnitTest1.cs
index c099fe3..a03b423 100644
--- a/Emne 3/UnitTesting/UnitTesting.Test/UnitTest1.cs	
+++ b/Emne 3/UnitTesting/UnitTesting.Test/UnitTest1.cs	
@@ -5,7 +5,30 @@ public class StatsTest
     [Test]
     public void TestWith3And4()
     {
+        // arrange
         var stats = new Stats();
-        Assert.Pass();
+        
+        //act
+        stats.Add(3);
+        stats.Add(4);
+        
+        // assert
+        Assert.AreEqual(2, stats.Count);
+        Assert.AreEqual(7, stats.Sum);
+        Assert.AreEqual(4, stats.Max);
+        Assert.AreEqual(3, stats.Min);
+        Assert.AreEqual(3.5, stats.Mean, 0.0001);
+    }
+
+    [Test]
+    public void TestEmptyStats()
+    {
+        var stats = new Stats();
+        
+        Assert.AreEqual(0, stats.Count);
+        Assert.AreEqual(0, stats.Sum);
+        Assert.IsNull(stats.Max);
+        Assert.IsNull(stats.Min);
+        Assert.AreEqual(float.NaN, stats.Mean);
     }
 }
\ No newline at end of file
diff --git a/Emne 3/UnitTesting/UnitTesting/Stats.cs b/Emne 3/UnitTesting/UnitTesting/Stats.cs
index 319bef2..eb49f1b 100644
--- a/Emne 3/UnitTesting/UnitTesting/Stats.cs	
+++ b/Emne 3/UnitTesting/UnitTesting/Stats.cs	
@@ -6,14 +6,14 @@ public class Stats
 {
     public int Count {get; private set;}
     public int Sum {get; private set;}
-    public int Max {get; private set;}
-    public int Min {get; private set;}
+    public int? Max { get; private set; }
+    public int? Min {get; private set;}
     public float Mean => (float)Sum / Count;
 
     public void Add(int number)
     {
-        if (Max == -1 || number > Max) Max = number;
-        if (Min == -1 || number < Min) Min = number;
+        if (Max == null || number > Max) Max = number;
+        if (Min == null || number < Min) Min = number;
         Count++;
         Sum += number;
     }
@@ -23,20 +23,22 @@ public class Stats
         return
             Format("Antall tall", Count) +
             Format("Sum", Sum) +
-            Format("Max", Max) +
-            Format("Min", Min) +
+            Format("Max", Max.Value) +
+            Format("Min", Min.Value) +
             Format("Gjennomsnitt", Mean);
             
     }
 
-    private static string Format(string label, float number)
+    private static string Format(string label, float? number)
     {
-        return FormatImpl(label, number.ToString("####.##"));
+        if (number == null) return String.Empty;
+        return FormatImpl(label, number.Value.ToString("####.##"));
     }
 
-    private static string Format(string label, int number)
+    private static string Format(string label, int? number)
     {
-        return FormatImpl(label, number.ToString("####"));
+        if (number == null) return String.Empty;
+        return FormatImpl(label, number.Value.ToString("####"));
     }
 
     private static string FormatImpl(string label, string number)