Let R_A and R_B be the returns for two securities with E(R_A) = 0.03 and E(R_B)) = 0.08, Var(R_A) = 0.02, Var(R_B) = 0.05, and Cov(R_A, R_B) = -0.01.

a) Plot the set of feasible mean-variance combinations of return, assuming that the two securities above are the only investment vehicles available.

b) If we want to minimize risk, how much of our portfolio will we invest in security A?

c) Find the mean and standard deviation of a portfolio that is 50% in security A