Please help me answer these questions for my Ethics class:

Reference Textbook: With a Clear Conscience: Business Ethics, Decision-Making, and Strategic Thinking

1. What are some mechanisms that can incentivize cooperation and ensure ethical behaviour in business and society?
2. What is the concept of enlightened self-interest, and how does it relate to the idea of a social contract
3. What is the free-rider problem, and how does it undermine cooperative outcomes? Give an example.