= Consider the integral I cos z da. Approximate the integral I by using the composite Simpson's rule S2n with node points # = 10i/2", i = 0, 1,..., 2" for n = 1,2,3,.... Let en = sin(10) - S2n. (a) Compute the ratio rn, for n= 1, 2, 3, 4, 5, 6. en+1' (b) Plot the graph of en versus n by using the "semilogy" command in MATLAB.