C language Code programming (NO C++ PLEASE)

3 Approximating The value of can be approximated using the Nilakantha series 4 4 4 2.3.44.5.66-7-8 8.9 10 10 11 12 12-13.14 Write a C function that calculates the value of with a variable level of accuracy. For instance, if the desired accuracy is 10-6, the absolute difference between the true value of r (see below) and the approximation from your function is less than 10-6. Use the function prototype double Pi_value (int numaccuracy ASSERT your function by running unit tests (see sec 5.7 in your Zybook) for values 1, 2, 3, 4, 5, 6 Examples of testing your function are const double pi = 3.14|592653589793238462643383 ; assert (fabs (Pi-value (2) _p)