Provide 5 really good test cases for only 1 test per equivalence class. can vary so sometimes naive mistakes are made. 5 good tests would consist of public interface Statistics ( // The mean or average of a set of values is the central // tendency of data commonly represented as the sum the values 7/ divided by the number of values. e.g. sum (v)/length (v) public double average (double ] values); Test Input for average 1.0 Output of average 1.0 Hints: Double.MAX_VALUE and Double.MIN_VALUE define the maximum and minimum double floating point values in Java. Also doubles can't represent all Real numbers. NaN in doubles means Not a Number (Double.NaN) as in undefined. Popular exceptions include DivideByZeroException and NullPointerException