Find the future values of the following ordinary annuities. a. PV of $400 paid each 6 months for 8 years at a nominal rate of 16%, compounded semiannually. Do not round intermediate calculations. Round your answer to the nearest cent. b. FV of $200 paid each 3 months for 8 years at a nominal rate of 16%, compounded quarterly. Do not round Intermediate calculations. Round your answer to the nearest cent. SE c. The annuities described in parts a and have the same amount of money paid into them during the 8-year period, and both earn interest at the same nominal rate, yet the annuity in part b earns more than the one in part a over the years. Why does this occur? -Select