use C programing only!

1 Approximating The value of can be approximated using the Nilakantha series ~3+2-3-4-4-5-6+6.7.8 8:9-10+10-11-12 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 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) -pi)