Problem
a. Create the logic for a program that performs arithmetic functions. Design the program to contain two numeric variables, and prompt the user for values for the variables. Pass both variables to methods named sum() and difference(). Create the logic for the methods sum() and difference(); they compute the sum of and difference between the values of two arguments, respectively. Each method should perform the appropriate computation and display the results.
b. Add a method named product() to the program in. The product() method should compute the result when multiplying two numbers, but not display the answer. Instead, it should return the answer to the calling program, which displays the answer.