There are two assets A and B whose returns are jointly normally distributed. The expected return on A, TA = 0.5, the standard deviation = 0.3, the expected return on B, r = 0.7, the standard deviation OB = 0.5, and the correlation coefficient, PAB = -0.5. a. Determine the expected return on a portfolio that assigns weight w on asset A and weight (1- w) on asset B. b. Determine the variance of the returns on a portfolio that assigns weight w on asset A and weight (1-w) on asset B. c. Determine weight w that minimises the variance of the portfolio in (b). Find the expected return and standard deviation associated with this w