2. Calculate the future value of $9,000 in a. 4 years at an interest rate of 7% per year. b. 8 years at an interest rate of 7% per year. c. 4 years at an interest rate of 14% per year. d. Why is the amount of interest earned in part a less than half the amount of interest earned in part b? a. 4 years at an interest rate of 7% per year. The future value of $9,000 in 4 years at an interest rate of 7% per year is $ b. 8 years at an interest rate of 7% per year. The future value of $9,000 in 8 years at an interest rate of 7% per year is $ c. 4 years at an interest rate of 14% per year. The future value of $9,000 in 4 years at an interest rate of 14% per year is $ (Round to the nearest dollar.) (Round to the nearest dollar.) (Round to the nearest dollar.) d. Why is the amount of interest earned in part a less than half the amount of interest earned in part b? (Select the best choice below.) A. This results because you earn interest on past interest. Since more interest has been paid at the end of the time period than at the beginning, the money grows faster. B. The interest earned in part a is based on a lower effective annual interest rate. C. The annual interest rate in part b is slightly higher than the rate assumed in part a. This is because of compounding. D. The amount of interest earned in part a is really half of the amount of interest earned in part b since in part b, the money grows for twice as many years as in part a