What is the accumulated sum of each of the following streams of payments?

a. $520 a year for 9 years compounded annually at 11 percent.

b. $96 a year for 8 years compounded annually at 8 percent.

c.$32 a year for 13 years compounded annually at 11percent.

d. $27 a year for 4 years compounded annually at 4 percent.