C programming

2. Write a program that defines the named constant PI, const double PI 3.1419;, which stores the value of . The program should use PI and the functions listed in Table 1 to accomplish the following. Output the value of Prompt the user to input the value of a double variable r, which stores the radius of a sphere. The program then outputs the following: a. b. a. The value of 4r, which is the surface area of the sphere. b. The value of (4/3)r, which is the volume of the sphere