8-9 Compute the (a) expected return and (b) Standard deviation of the following investments: (c) Suppose you form a portfolio that consists of 60 percent Investment ABC and 40 percent n vestment RST. Compute the expected return and standard deviation of the portfolio. (d) Compare the portfolio?s standard deviation with the indivdual investments' standard deviations. 8-10 Of the $60,000 invested in a two-stock portfolios 40 percent is invested in Stock S and 60 percent