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2. Explain why preferred stock has features similar to a corporate bond as well as common stock. 3. The expected return on a portfolio of stocks is the weighted average of the expected returns on individual stocks in the portfolio, where the weights represent the proportionate investment in each stock. Is the portfolio standard deviation also a weighted average of the individual stock's standard deviation? 4. What is diversification? In this context, explain what diversifiable risk and market risk is. Give a few examples of each type of risk. How is market risk measured? 5. During a pandemic as we are going through one now, investors typically become more risk averse. Using a graph and the risk-return concepts you learnt in the course, explain how this impacts their required return on risky investments