In c++ please

2. Write a program that defines the named constant PI, const double PI 3.1419;, which stores the value of ? . The progran 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. The value of r2 , which is the surface area of the sphere. The value of (4/ 3) .3 , which is the volume of the sphere. a. b