1. Using a graph which has a well labeled scale show how the monopolies makes extra-ordinary profit

2. Define and explain the meaningprice discrimination

3. State and explain the degrees of price discrimination

4. Explain the meaning of barriers to entry and exist

5. Describe the circumstances under which a firm may exist the industry in the long run

6. Explain how a firm may shut down in the short run

7. Define total cost

8. Define the marginal rate of substitution

Please give a detailed explanation don't just copy from the internet