How much would you have to invest today to receive the following Use Appendix Band Appendix D for an approximate answer, but calculate your final answer using the formula and financial calculator methods. .. $13,100 in 9 years at 9 percent (Do not round intermediate calculations. Round your final answer to 2 decimal places.) Present value b. $17,000 in 20 years at 7 percent. (Do not round intermediate calculations. Round your finel answer to 2 decimal places.) Present value c. $6,800 each year for 20 years at 6 percent (Do not round Intermediate calculations. Round your final answer to 2 decimal c. $6,800 each year for 20 years at 6 percent. (Do not round intermediate calculations. Round your final answer to 2 decimal places.) Present value d. $45,000 each year for 40 years at 10 percent (Do not round intermediate calculations, Round your final answer to 2 decimal places.) Present value