If you invest $15,000 today, how much will you have in each of the following instances? Use Appendix A as an approximate answer, but calculate your final answer using the formula and financial calculator methods.

a. In 6 years at 8 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)

b. In 17 years at 9 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)

c. In 15 years at 8 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)

d. In 14 years at 8 percent (compounded semiannually)? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)