In computing the cost of equity for a firm, which of the following are recommended steps in estimating the CAPM beta using regression analysis? 1. Use a sample size equal to or greater than 60. II. Use daily returns. III. Use a diversified value-weighted index. IV. Watch for possible distortions from market bubbles. O I, III, and IV only O I, II, and III only O II and IV only II, III, and IV only