4. You are given the following data on three series of payments: Accumulated value at the end of year 18 Payment at end of year 6 12 18 Series A240 200 300 700 X+100 Series B 0 360 Series CY 600 Assume interest is compounded annually. Calculate Y. 4. You are given the following data on three series of payments: Accumulated value at the end of year 18 Payment at end of year 6 12 18 Series A240 200 300 700 X+100 Series B 0 360 Series CY 600 Assume interest is compounded annually. Calculate Y