If you invest $9,800 per period for the following number of periods, how much would you have received at the end? Use Appendix C. (Round "Factor" to 3 decimal places. Round the final answers to the nearest whole dollar.) a. 13 years at 8 percent Future value $ 210651 b. 18 years at 12 percent Future value $ 546347 c. 15 periods at 8 percent Future value $ 266090.72