Has to be written in Python. Cannot use numpy, can only import math.

a) Write a function defined as: def Simpson (fan, a, b, npoints = 21): Purpose: use Simpson's 1/3 rule to estimate the integral of fen(x), between the limits of a and b. fcn: the function we want to integrate a and the lower and upper limits of integration npoints: The number of integration points used in the range to (inclusive). npoints must be an ODD number. If ppoinzs is not ODD, then add 1 to make it odd! return value: the estimate of the integral Write and call a main () function that uses your Simpson function to estimate and print the integral of: x-3cos(x): with a=1, b=3, npoints = 10 cos (2x).x": with a=2, b=3, npoints = 23