Equation 9.4 shows the relation between a stock's value and the dividend that is expected next year if dividends grow at a constant rate forever. If a firm pays all of its earnings as dividends, show how Equation 9.4 can be rearranged to calculate that firm's P/E ratio. What does this tell us about the factors that determine a firm's P/E ratio? Constant- P0=RgD1 growth dividend model