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Compute the (a) expected return and (b) standard deviation of the following investments: 8-9 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 con- sists of 60 percent Investment ABC and 40 percent Investment RST. Compute the expect- ed return and standard deviation of the portfo- lio. (d) Compare the portfolio's standard devia- tion with the individual investments' standard deviations