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. $8,500 in 11 years at 7 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.) b. $17,500 in 6 years at 8 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.) c. $27,000 in 17 years at 9 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)