Suppose Shell purchased every gas company in the world and set their prices. Then, it would have a control of the gas market with no other...

Suppose Shell purchased every gas company in the world and set their prices. Then, it would have a control of the gas market with no other competition. Thus Shell becomes a monopolist in providing gas. The market demand curve faced by Shell is P = -Q + 40, and Shell's cost is given by TC=Q2 + 140, and the marginal cost is given by MC=2Q. 

1. What will Shell's total profit be?
2. 30
3. 140
4. 20
5. 60