I need this in C programming. I'm not sure how to write the code as a function type. I am also using Microsoft visual studio to run the program.

The following fomula gives the distance between two points, (xi, yi) and (x2,?in the Cartesian plane: 4. Given the center and a point on the circle, you can use this formula to find the radius of the circle. Write a program that prompts the user to enter the center and a point on the circle. The program should then output the circle's radius, diameter, circumference, and area. Your program must have at least the following functions: a. distance: This function takes as its parameters four numbers that represent two points in the plane and returns the distance between them. b. radius: This function takes as its parameters four numbers that represent the center c. circumference: This fiunction takes as its parameter a number that represents the d. area: This function takes as its parameter a number that represents the radius of the and a point on the circle, calls the function distance to find the radius of the circle, and returns the circle's radius. radius of the circle and retuns the circle's circumference. (If r is the radius, the circumference is 2?.) circle and returns the circle's area. (If r is the radius, the area is r) Assume that p-3.1416