pls answer a, b and c

For each of the following. determine the expected cash flows.(Round answers to o decimal places, e.g. 5,845. Show amounts that decrease cash flow with either a - sign e.g. - 15,000 or in parenthesis e.g. (15,000).) Cash Flow Probability Expected Estimate Assessment Cash Flow (a) $4.920 20 % $ 6,390 60 % 7,680 20 % Total Expected Value $ (b) $5,500 30 % 7.420 50 % 8,790 20 % Total Expected Value (c) $(1,290) 10 % 3,360 80 % 5,330 10 % Total Expected Value