(Complex present value) How much do you have to deposit today so that beginning 15 years from now you can withdraw $8,000 a year for the next 3 years (periods 15 through 17) plus an additional amount of $16,000 in that last year (period 17)? Assume an interest rate of 7 percent. a. What is the value of the $8,000 withdrawals in years 15 through 17 at the end of year 14 if the annual interest rate is 7 percent? (Round to the nearest cent.) b. What is the present value today of the 3-year $8,000 annuity at the end of year 14 (found in part a) if the annual interest rate is 7 percent? \$ (Round to the nearest cent.) c. What is the present value of the amount of $16,000 withdrawal in year 17 if the annual discount rate is 7 percent? (Round to the nearest cent.) d. How much do you have to deposit today so that beginning 15 years from now you can withdraw $8,000 a year for the next 3 years (periods 15 through 17) plus an additional amount of $16,000 in that last year (period 17)? (Round to the nearest cent.)