4. Security-A has an expected retum of 7%, a standard deviation of returns of 35%, a covariance with the market of 0.11, and a beta coefficient of 1.1. Security-B has an expected return of 12%, a standard deviation of returns of 10%, covariance with the market of 0.1, and a beta coefficient of 1.0. Which security is riskier? Why? (4)