Ch 08- End-of-Chapter Problems - Risk and Rates of Return 20. Problem 8.20 (Realized Rates of Return) Stocks A and B have the following historical returns: a. Calculate the average rate of return for each stock during the period 2016 through 2020. Round your answers to two decimal places. Stock A: % Stock B: % answers to two decimal places. Negative values should be indicated by a minus sign. What would the average return on the portfolio have been during this period? Round your answer to two decimal places. % e. Assuming you are a risk-averse investor, would you prefer to hold Stock A, Stock B, or the portfolio