How much money can be withdrawn at the end of the investment period if
a. $1,000 is invested at 8 percent/year compounded annually for 10 years?
b. $5,000 is invested at 11 percent/year compounded annually for 4 years?
c. $13,000 is invested at 9 percent/year compounded annually for 7 years?
d. $25,000 is invested at 10 percent/year compounded annually for 3 years?