IN PYTHON
Write functions for the following:
sphereArea (radius): It returns the surface area of a sphere having the given radius. The formula is A = 4 pr2.
sphereVolume(radius): It returns the volume of a sphere having the given radius. The formula is V = (4/3) pr3.
Then write a main program that uses these functions to compute the surface area and volume of a sphere given the radius.
The program should prompt the user for the radius and then print out the surface area and volume.