Required: a. $33,750 paid at the end of four years. The discount rate is 5 percent. b. $5,200 paid at the end of three years and $7,950 paid at the end of five years. The discount rate is 7 percent. c. $10,900 paid annually at the end of each of the next four years. The discount rate is 5 percent. d. $1,920 paid annually at the end of each of the next four years and $3,840 paid at the end of the fifth year. The discount rate is 6 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