Assume you make the following investments: a. You invest a lump sum of $7,750 for five years at 14% interest. What is the investment's value at the end of five years? b. In a different account earning 14% interest, you invest $1,550 at the end of each year for five years. What is the investment's value at the end of five 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.) factor table.) (Click the icon to view the present value factor table.) factor table.) (Click the icon to view the future value annuity (Click the icon to view the present value annuity a. You invest a lump sum of $7,750 for five years at 14% interest. What is the investment's value at the end of five years? (Round your answer to the nearest whole dollar.) Investment's value =