2) For the above function f (2) = 2 + x2 and the answers in problem 1): (a) Calculate the exact value of the integral f. f (x)dx (b) What are the absolute and relative errors of the lower and upper sums with respect to the exact value? (c) The error of an integration based on a Riemann sum may be given as the difference between the upper sum and lower sum: lerror|