Use the present value tables in AppendixA and to compute the NPV of each of the following cash inflows: Required: a. $22,900 received at the end of 15 years. The discount rate is 8 percent. b. $6,640 received at the end of four years and $16,400 received at the end of eight years. The discount rate is 10 percent. c. $1,680 received annually at the end of each of the next seven years. The discount rate is 7 percent. d. $56,250 received annually at the end of each of the next three years and $74,000 received at the end of the fourth year. The discount rate is 3 percent. Note: For all requirements, round discount factor(s) to 3 decimal places, all other intermediate calculations and final answers to the nearest whole dollar amount