Assume you make the following investments: a. You invest a lump sum of $8,550 for four years at 12% interest. What is the invostment's value at the end of four years? b. In a diflerent account eaming 12% interest, you invest $2,138 at the end of each year for four years. What is the investmentrs 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 icen to view the present value factor tablo.) (Click the icon to viow the present value annuity factor table.) a. You irvost a lump sum of $8,550 for four years at 12% thterest. What is the investments value at the end of four years? (Round your anwwer to the nearest whole dollar.) imvestments value =