a. You invest a lump sum of $7,750 for four years at 14% interest. What is the investment's value at the end of four years? b. In a different account earning 14% interest, you invest $1,938 at the end of each year for four years. What is the investment's value at the end of four years? c. What general rule of thumb explains the difference in the investments' future values? (Click the icon to view the future value factor table.) (Click the icon to view the future value annuity factor table.) (Click the icon to view the present value factor table.) (Click the icon to view the present value annuity factor table.) a. You invest a lump sum of $7,750 for four years at 14% interest. What is the investment's value at the end of four years? (Round your answer to the nearest whole dollar.) Investment's value = Reference Reference