Calculate the future value of $7,000 in a. 3 years at an interest rate of 7% per year. b. 6 years at an interest rate of 7% per year. c. 3 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. Calculate the future value of $7,000 in 3 years at an interest rate of 7% per year. The future value of $7,000 in 3 years at an interest rate of 7% per year is $ (Round to the nearest dollar.)