Exercise 1: //The max function the max between a and b, it returns a if a == //b public double max(double a, double b); //The mult function returns the result of a * b public double mult(double a,...

Exercise 1:

1. 
   //The max function the max between a and b, it returns a if a == //b
   

public double max(double a, double b);

1. 
   //The mult function returns the result of a * b public double mult(double a, double b);
   
   

1. 
   //The exist in array function returns the index of the element //‘a’ if //‘a’ exist in array ‘arr’ otherwise returns ‘-1’ public int existsInArray(int [] arr, int a);
   
   

1. 
   //Are array equals method compares two arrays and returns true // if the elements of array ‘a’ are equal to elements of array
   
   

// ‘b’, element by element. If equals it returns 0, it returns -

// 1 if not

public int areArrayEquals(int [] a, int [] b);

Devise four executable test cases for every method in the JUnit notation. See the attached handout for a refresher on the notation.