Investment X has a 25% chance of producing a 22% return, a 50% chance of producing a 17% return, and a 25% chance of producing a return of -8%. What's Investment X's coefficient of variation? 01.026 0.875 O 1.326 0.975 O 1.128 Suppose a stock has a beta of 1.5, the risk-free rate is 6.0%, and the market risk premium is 4.5%. If the stock's beta falls to 1.0 but the other two variables remain unchanged, by how much would the stock's required rate of return decline? O 1.71% 0.92% 2.18% 2.25% O 1.35%