(Compound annuity) What is the accumulated sum of each of the following streams of payments? a. $510 a year for 8 years compounded annually at 9 percent. b. $104 a year for 7 years compounded annually at 7 percent. c. $33 a year for 11 years compounded annually at 12 percent. d. $24 a year for 5 years compounded annually at 5 percent. a. What is the accumulated sum of $510 a year for 8 years compounded annually at 9 percent? \$ (Round to the nearest cent.) b. What is the accumulated sum of $104 a year for 7 years compounded annually at 7 percent? $ (Round to the nearest cent.) c. What is the accumulated sum of $33 a year for 11 years compounded annually at 12 percent? $ (Round to the nearest cent.) d. What is the accumulated sum of $24 a year for 5 years compounded annually at 5 percent? $ (Round to the nearest cent.)