The instructions for the given integral have two parts, one for the trapezoidal rule and one for Simpson's rule. Complete the following parts 5t +8t) dt I. Using the trapezoidal rule complete the following Estimate the integral with n = 4 steps and find an upper bound for 1 ET a. (5t3 +8t) dt = Simplify your answer.) The upper bound is (Simplify your answer.) b Evaluate the integral directly and find ! ET 5t3 + 8t) dt = Simplify your answer.) Simplify your answer.) c. Use the formula (ET|/true value)) Ã 100 to express ET| as a percentage of the integral's true value (Simplify your answer. Round to the nearest integer as needed.) Il. Using Simpson's rule complete the following a. Estimate the integral with n=4 steps and find an upper bound for Es