Return for Stock A = 0.145283%

Return for Stock B = 1.266084%

Return for Stock C = 2.742402%

Treasury Bill is independent.

We consider the following FOUR possible portfolios: Portfolio 1: 20% stock A and 80% stock B; Portfolio 2: 80% stock B and 20% stock C; Portfolio 3: 50% stock A and 45% stock B and 5% Treasury Bill; Portfolio 4: 60% stock A and 30% stock C and 10% Treasury Bill (Let assume Treasury Bill is independent of other three stocks); (a) Derive the expected value and variance of all four portfolios (show all workings); For example, E(Portfolio 9) = E(ax A + CTC), E(ax A) + E(cc), aE(TA)+ cE(cc)