What is the present value of the following? Use Appendix B as an approximate answer, but calculate your final answer using the formula and financial calculator methods. a. $7,700 in 9 years at 5 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.) b. $16,400 in 7 years at 6 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.) c. $25,600 in 14 years at 11 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)