How much would you have to invest today to receive the following? Use Appendix B and Appendix D for an approximate answer, but calculate your final answer using the formula and financial calculator methods. a.$15,000 in 10 years at 14 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)b.$19,500 in 20 years at 15 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places. c.$7,900 each year for 19 years at 12 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)d.$54,000 each year for 50 years at 10 percent? (Do not round intermediate calculations. Round your final answer to 2 decimal places.)