After reading this week chapters, answer the following question: 1. What was the purpose of the Sarbanes-Oxley Act of 2002? 2. The efficient market hypothesis is interpreted in a weak form, a semistrong form, and a strong form. How can we differentiate its various forms? 3. How would you define efficient security markets? 4. What are electronic communication networks (ECNs)? Generally speaking, are they currently part of the operations of the New York Stock Exchange and the NASDAQ Stock Market? 5. Explain the role of financial intermediaries in the flow of funds through the three-sector economy