Compute the (a) expected return and (b) standard deviation of the following investments: Probability 0.1 0.6 0.3 22.0% 12.0 2.0 - 2.0% 12.0 30.0 (c) Suppose you form a portfolio that consists of 60 percent Investment ABC and 40 percent Investment RST. Compute the expected return and standard deviation of the portfo-lio. (d) Compare the portfolio's standard deviation with the individual investments' standard deviations