write c program to do the following:

3. Compute the area of a sector of a circle when is the angle in radians between the radii. Hint: where is in radians) Note Boh and to be given s gfacion) 4. Compute the volume of a sphere of radius. (Hint:) [Hint: Use the macro #define PI 3.14159] INote: Her i to be given as ingu using scanf functionl)