1. Write a function that computes the value of the mathematical constant z. The value of can be approximately computed using the infinite series = 4(1-1/3+1/5 - 1/7 + 1/9 - 1/11+1/13 - 1/15 + . . . . ..) The function prototype is double compute_pi(int n). The function computes the value of using the first n terms of the infinite series and returns the value. 2. Write a function that computes the square root of a number. The square root of a number x can be approximately computed as follows. First guess that the square root of x is 1. Then repeatedly get the next guess from the last guess using the rule next = 0.5(last +x/ last) where last is the last guess and next is the next guess. Repeat ten times using a loop and the tenth guess will be approximately the square root. The function prototype is double compute_sqrt (double x). The function computes the square root of x and returns the square root.