Many mathematical operations can be expressed, or are defined, in terms of other, simpler, operations. in particular, multiplication is defined in terms of addition, because the product of integers a and b can be obtained by adding a to itself, b times. in other words, a * b = a + a + a + + a b times in the above, we assume that b is a non-negative integer. program: in this programming assignment, we will write two different, but equivalent, c++ functions for integer multiplication, based upon the above definition of multiplication. our first function will be iterative, and the second one recursive. declarations of our functions are: int muli(int a, int b); int mulr (int a, int b); the function muli should compute the products of its parameters a and b by iteration, while the function mulr should compute the product of its parameters by recursion. the parameter a may be any integer value, but you may assume that the parameter b of the above functions is a non-negative integer, i. e. b> 0. write declarations and definitions of both above functions in a single c++ source file. also include in this file, a mainline that prompts for and inputs two integers, verifies that the second of these two input integers is non-negative, and outputs their products obtained from each of the above functions. notes: • a typical sample run of your program should look like (output blue, input red): enter two integers: 5 13 product obtained iteratively = 65 product obtained recursively = 65 page 1 of 2