Calculate the future value of $8,000 in a. 6 years at an interest rate of 6% per year. b. 12 years at an interest rate of 6% per year. c. 6 years at an interest rate of 12% per year. d. Why is the amount of interest earned in part (a) less than haif the amount of interest earned in part (b)? a. 6 years at an interest rate of 6% per year: The future value of $8,000 in 6 years at an interest rate of 6% per year is $ (Round to the nearest cent.) b. 12 years at an interest rate of 6% per year. The future value of $8,000 in 12 years at an interest rate of 6% per year is $ (Round to the nearest cent) c. 6 years at an interest rate of 12% per year. The future value of $8,000 in 6 years at an interest rate of 12% per year is $ (Round to the nearest cent.) d. Why is the amount of interest eamed in part (a) less than half the amount of interest earned in part (b)? (Select the best choice below.) A. The annual interest rate in part (b) is slightly higher than the rate assumed in part (a). This is because of compounding. B. 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 me C. The interest earned in part (a) is based on a lower effective annual interest rate. 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 man