4. Suppose So f(x)dx = 2, S3 f(x)dx = -5 and S3 g(x)dx = 1. Evaluate the following intervals. a) S5 (3f(x) - g(x)) dx b) So (f (x) + 2g(2)) dac c) So5f(x)dx 5. Find the value of f (x3 + 1) dx by evaluating a right Riemann and letting n > co. Hint: The interval a, b is divided into n subinterval of length Ax = b-a = 2, which n produces the grid points * = atk Ax = 0+ k . 2 = 2k, for k = 1, 2, ... , n n