c. 136 a yey te th yeare cotpourand m muly at thperert Hround is the rewest wert (Compound annuity) What is the accumulated sum of each of the following streams of payments? a. $510 a year for 9 years compounded annually at 10 percent. b. $100 a year for 7 years compounded annually at 8 percent. c. $36 a year for 11 years compounded annually at 11 percent. d. $28 a year for 5 years compounded annually at 6 percent. a. What is the accumulated sum of $510 a year for 9 years compounded annually at 10 percent? $ (Round to the nearest cent.)