The production function for an oil-producing company is 500ln (t2 + 64) - 500ln (64). Production is measured in thousands of barrels of oil and t is in years. a. Find the rate of oil production function. b. Estimate the number of barrels of oil that will be produced during the 5th year. c. Is the estimate an overestimate or an underestimate? You must show your work. d. Find the hierarchy of points using the 2nd derivative as the initial derivative ser equal to zero