(Compound annuity) What is the accumulated sum of each of the following streams of payments? a. $520 a year for 10 years compounded annually at 11 percent. b. $100 a year for 8 years compounded annually at 9 percent. c. $34 a year for 11 years compounded annually at 13percent. d. $27 a year for 5 years compounded annually at 5 percent. a. What is the accumulated sum of $520 a year for 10 years compounded annually at 11 percent? $(Round to the nearest cent.) b. What is the accumulated sum of $108 a year for 8 years compounded annually at 9 percent? (Round to the nearest cent.) c. What is the accumulated sum of $34 a year for 11 years compounded annually at 13percent? (Round to the nearest cent) d. What is the accumulated sum of $27 a year for 5 years compounded annually at 5 percent? (Round to the nearest cent.)