Saved Help Save 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 8 years at 10 percent. (Do not round Intermediate calculations. Round your final answer to 2 decimal places.) Present value b. $20,000 in 12 years at 13 percent. (Do not round Intermediate calculations. Round your final answer to 2 decimal places.) Present value c. $6,000 each year for 10 years at 9 percent. (Do not round intermediate calculations. Round your final answer to 2 decimal places.) Present value