(a) Determine the expected present worth of the fol- lowing cash flow series if each series may be real ized with the probability shown at the head of each expected AW value for the same cash flow series. Annual Cash Flow, $ per Year Year Prob. 0.5 Prob. 0.2 Prob. 0.3 -5000 1000 1000 1000 -4000 3000 1200 -800 0 -6000 500 1500