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. $13,100 in 9 years at 9 percent. Note: Do not round intermediate calculations. Round your final answer to 2 decimal places. > Answer is complete but not entirely correct. Present value $ 6,860.37 b. $17,000 in 20 years at 7 percent. Note: Do not round intermediate calculations. Round your final answer to 2 decimal places. Answer is complete but not entirely correct. Present value $ 2,075.14 x