Exercise Use Junit and JaCoCo to achieve 100% test coverage for the following Calculator class in Java public class Calculator { public int add(int x, int y) { return x+y; } public int subtract(int x, int y) { return x-y; } public int multiply(int x, int y) { return x*y; } public int divide(int x, int y) { if(y== 0) { throw new java.lang.ArithmeticException("Can't divide by zero!"); } return x/y;