Ex Post Market Security J Observations Return Return - -5.7% -10.6% W N 12.0% 25.5% 10.1% 15.2% 20.7% 22.8% 17 9% 26.3% If the risk-free rate is expected to be 5 percent for the coming period, and if the best guess of th market's expected return is its historical average, then what is the best estimate of Security J's required rate of return for the coming period, assuming that CAPM is correct? 13.2% 13.6% 13.8% 13.4% 13.0%