Present value for various discounting periods Find the present value of $500 due in the future under each of these conditions. a. 4% nominal rate, semiannual compounding discounted back 9 years. Round your answer to the nearest cent. b. 4% nominal rate, quarterly compounding, discounted back 9 years. Round your answer to the nearest cent. c. 4% nominal rate, monthly compounding discounted back 1 year, Round your answer to the nearest cent. d. Why do the difference in the PVs occur