(Compound annuity) What is the accumulated sum of each of the following streams of payments? a. $500 a year for 8 years compounded annually at 10 percent. b. $96 a year for 6 years compounded annually at 7 percent c. $37 a year for 11 years compounded annually at 11 percent d. $26 a year for 5 years compounded annually at 4 percent. a. What is the accumulated sum of $500 a year for 8 years compounded annually at 10 percent? $ (Round to the nearest cent.) b. What is the accumulated sum of $96 a year for 6 years compounded annually at 7 percent? $ (Round to the nearest cent.) c. What is the accumulated sum of $37 a year for 11 years compounded annually at 11percent? $ (Round to the nearest cent.) d. What is the accumulated sum of $26 a year for 5 years compounded annually at 4 percent? (Round to the nearest cent.)