Find the present value of $500 due in the future under each of these conditions: a. 6% nominal rate, semiannual compounding, discounted back 5 years. Do not round Intermediate calculations. Round your answer to the nearest cent. b. 6% nominal rate, quarterly compounding, discounted back 5 years. Do not round Intermediate calculations. Round your answer to the nearest 6% nominal rate, monthly compounding, discounted back 1 year. Do not round intermediate calculations. Round your answer to the nearest fferences in the PL occur