I am working on my study guide for my final exam and im not sure my answers are correct. Can someone help me out please?

1. What are the four factors of production? What are examples of each factor of production?

2. What is scarcity?

3. What is opportunity cost?

4. What is a trade-off?

5. What are the three basic economic choices/decisions? How are they made in a market economy? In a command economy? What type of economic system exists in the United States?

6. What is marginal cost? What is marginal benefit? What role do these concepts play in making decisions?

7. Who was Adam Smith? What were some of the main economic concepts / ideas he developed?

8. What are the general types of tasks people look to the government to perform?

9. What is a market? What is the difference between a factor market and a product market?