I need the answer of this problem in C language please.

Problem 3: Polygon Area 0 pts A regular polygon is an n-sided polygon in which all sides are of the same length and all angles have the same degree (i.e., the polygon is both equilateral and equiangular). The formula for computing the area of a regular polygon is Write a function called polygonArea that takes no parameters and it returns the area of a regular polygon. Inside the function asks the user to input the number of sides and then enter the length of the side, then let the function calculate the area base don the formula above. Function call Call the function inside the main function and output the returned value in a proper message. Here is a sample run Enter the number of sides: 5 Enter the side: 6.5 The area of the polygon is 72.690