Assume you make the following investments:

a.	You invest a lump sum of $7,550 for five years at 12% interest. What is the investment's value at the end of fivefive years?
b.	In a different account earning 1212% interest, you invest $1,510 at the end of each year for fivefive years. What is the investment's value at the end of fivefive years?
c.	What general rule of thumb explains the difference in the investments' future values?