4-27 Future value of a mixed stream For each of the mixed streams of cash flows shown in the following table, determine the future value at the end of the final year if deposits are made into an account paying annual interest of 12%, as- suming that no withdrawals are made during the period and that the deposits are made: a. At the end of each year. b. At the beginning of each year. Cash flow stream B Year 1 2 3 4 5 $ 900 1,000 1,200 $30,000 25,000 20,000 10,000 5,000 $1,200 1,200 1,000 1,900