done.

Answersr.md

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+**Question 1:** 
+
+1) Not starting the array off at 0.
+
+2) Using an interger and double type in the same array.
+
+3) Having too many values in the array. 
+
+
+**Question 2:**
+
+1) "A new instance of a class." - A n empty new array will be created with a refernce to `scoreboard`. 
+
+2) "An instance with a single mutation." - 1 item will be added to the array for `score`.
+
+3) "An instance with multiple mutations." - Mutiple items will be added to the array.
+
+
+**Question 3:**
+
+A new instance of a class would be a range [0,0). There are no mutators.
+
+

Average.java

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+public class Average{
+
+  int count = 0;
+  double sum = 0;
+
+  public void addValue(double value){
+      sum += value;
+      count += 1;
+    }
+
+  public double getAverage(){
+    if (count == 0){
+      return 0;
+    }
+      else{
+      return sum / count;
+   }
+ }
+
+  public int getCount (){
+      return count;
+  } 
+}

AverageTest.java

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+import junit.framework.TestCase;
+
+public class AverageTest extends TestCase{
+
+   public void testNewAverage(){
+    Average avg = new Average();
+
+    assertEquals(0, avg.getCount());
+    assertEquals(0.0, avg.getAverage(), 0.001);
+
+    }
+
+
+   public void testSingleValue(){
+
+     Average avg = new Average();
+
+    avg.addValue(5.5);
+
+    assertEquals(5.5, avg.getAverage(), 0.001);
+    assertEquals(1, avg.getCount());
+
+    }
+
+    public void testFiveValuesNonZeroAverage(){
+
+      Average avg = new Average();
+
+      avg.addValue(1);
+      avg.addValue(2);
+      avg.addValue(3);
+      avg.addValue(4);
+      avg.addValue(5);
+
+      assertEquals(3.0, avg.getAverage(), 0.001);
+      assertEquals(5, avg.getCount());
+    }
+
+    public void testFiveValuesZeroAverage(){
+
+      Average avg = new Average();
+
+      avg.addValue(-1);
+      avg.addValue(-1);
+      avg.addValue(0);
+      avg.addValue(1);
+      avg.addValue(1);
+
+      assertEquals(0.0, avg.getAverage(), 0.001);
+      assertEquals(5, avg.getCount());
+    }
+
+    public void testFiveValuesSameAverage(){
+
+      Average avg = new Average();
+
+      avg.addValue(1);
+      avg.addValue(1);
+      avg.addValue(1);
+      avg.addValue(1);
+      avg.addValue(1);
+
+      assertEquals(1.0, avg.getAverage(), 0.001);
+      assertEquals(5, avg.getCount());
+    }
+}
+
+
+
+
+
+
+
+
+
+
+
+
+

Range.java

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+public class Range{
+  double min = 0;
+  double max = 0;
+  double width = 0;
+
+  public Range (double start, double stop){
+    if (start == stop){
+      start = 0;
+      start = 0;
+  }
+    else{
+      if (stop < start){
+        min = stop;
+        max = start;
+        }
+      if (start < stop){
+        min = start;
+        max = stop;
+      }
+    }
+  }
+
+  public boolean contains(double value){
+    return true;
+
+  }
+
+  public double getWidth(){
+    return 0.0;
+
+  }
+
+  public double getMin(){
+    return min;
+  }
+
+  public double getMax(){
+    return max;
+  }
+
+  public Range intersection(Range other){
+    return new Range(0.0, 0.0);
+  }
+}
+

RangeTest.java

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+import junit.framework.TestCase;
+
+public class RangeTest extends TestCase {
+  public void testNewRange(){
+    Range rng = new Range(0.0, 0.0);
+  }
+
+  public void testMin() {
+    Range r1 = new Range(1.0, 10.0);
+    assertEquals(1.0, r1.getMin());
+
+    Range r2 = new Range(5.0, -1.2);
+    assertEquals(-1.2, r2.getMin());
+  }
+}