1) Write a C program with two user defined functions. The first function has two double numbers in the parameter list and returns the product of those two numbers. The second function also has two double numbers in the parameter list and returns the sum of those two numbers The main function will prompt the user to enter two double numbers, print them onto the monitor screen and call user function one and then call user function two. The main function will also print the returned values to the monitor screen. (15 pts)