Q 8.33. Download 5 years of historical monthly (dividend-adjusted) prices for Coca-Cola (KO) and the S&P 500 from YAHOO! FINANCE. 1. Compute the monthly rates of return. 2. Compute the average rate of return and risk of portfolios that combine KO and the S&P 500 in the following proportions: (0.0, 1.0), (0.2,0.8), (0.4,0.6), (0.6, 0.4), (0.8, 0.2), (1.0, 0.0). Then plot them against one another. What does the plot look like? 3. Compute the market beta of Coca-Cola.