please help me following questions

1. How is a stock broker not like a bank? How is a stock dealer not like a stock broker? More generally, what are the general defining characteristics that distinguish brokers, dealers, investment bankers, and financial intermediaries from each other? How does each type of agent make its profits? Have you ever dealt with these kinds of agents? 2. What (if anything) do financial intermediaries such as banks do for an economy that brokers and dealers can't do (or can't do as well)? What (if anything) do brokers and dealers do for an economy that financial intermediaries can't do (or can't do as well)? 3. What are the key defining characteristics of auction markets, over-the-counter markets, organized exchanges, and intermediation financial markets? Which, if any, of these types of markets have you participated in? What's the difference between "financial exchange" and instances of "finance"? 5. What's the distinction between "direct finance" and "indirect finance" all about? Why might it be important to an economy to have both types of finance