Problem 8-3 IRR/NPV (LO1) The following are the cash flows of two projects: Year 0 1 2 3 4 Project A Project B $(310) $(310) 140 210 140 210 140 210 140 a. Calculate the NPV for both projects if the opportunity cost of capital is 15%. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Project NPV A B b. Suppose that you can choose only one of these projects. Which would you choose