write the program above in C. Only in C, thank you.

3.. The factorial of a nonnegative integer n (written n!) is defined as follows: n!-1*2*3*... *n (for values of n greater than or equal to 1) and n!-1 (for n 0) a. Prompt the user for an integer n between 5 and 12 for which the factorial is to be found. Use a while validation loop to restrict the value of n to an integer between 5 an