(Program) a. A second-degree polynomial in x is given by the expression ax + bx c, where a b, and c are known numbers and a is not equal to O. Write a C++ function named polyTwo (a,b,c,x) that computes and returns the value of a second-degree polynomial for any passed values of a, b, c, and x. b. Include the function written in Exercise 15a in a working program. Make sure your function is called from main) and returns a value to main) correctly. Have main use a cout statement to display the returned value. Test the function by passing various data to it and verifying the returned value