8. Why do CEOs tend to stay in their jobs despite lack-luster performance? How does social convention and the boardroom atmosphere' impede the process of CEO assessment and change? 9. Discuss the concept of Mr. Market." Why is "Mr. Market a good friend to have? Why should we exercise caution when listening to Mr. Market?" 10. What is the concept of arbitrage? What questions must we ask ourselves when engaging in arbitrage? How often does Berkshire engage in arbitrage