Decision Support Systems

the question give it to me like this

Profit Frequency Probability Cumulative probability 3% 18% 5000 6000 7000 8000 9000 10000 11000 10 60 70 180 50 10 20 3% 15% 18% 45% 13% 3% 5% 35% 80% 93% 95% 100% The manger wants to take a decision on the above project, what should be the manager decision if: a) The manger can accept profit of $8000 or above b) The manager can accept profit of $8000 c) The manager can accept profit of $7000