A commercial bank and an investment bank

A commercial bank and an investment bank     What’s the difference between a commercial bank and an investment bank? List the major types of financial institutions, and briefly describe the primary function of each. What are some important differences between mutual funds, Exchange Traded Funds, and hedge funds? How are they similar? What’s the difference between a commercial bank and an investment bank? What is an Exchange traded fund and how does it differ from a Mutual Fund or a Hedge Fund?