4. Answer the following questions given the information in the table below. Return on Stock A 9% 11% 15% 18% Return on Stock B 12% 5% 6% 3% Calculate the sample standard deviation and the arithmetic average return for both stocks. Compute the weights that will that will result in the minimum variance portfolio from combinin6g Stock A and Stock B, given a correlation of -0.3673. Calculate the portfolio standard deviation and expected return for a portfolio that invests 60% in A and 40% in B, given a correlation of-0.3673. a. b. C