3. What is the future value eight years from now of each of the following cash-flow streams if money can earn 9% compounded semiannually? a)A single payment of $5000 today. b)An ordinary annuity starting today with eight annual payments of $900 c) An ordinary annuity starting in three years with 20 quarterly payments of $400 4. Ken sold his car to Carolyn for $2000 down and monthly payments of $160.70 for 3 years, including interest at 12% compounded monthly. What was the selling price of the car