2) (30 points) You are given joint probability distribution of stock and bond returns below. What is the covariance between stock and bond returns? Acrot Stock return (S) -0.04 0.08 0.2 0.4 0.3 0.1 f(S,B) -0.01 0.03 Bond Return (B) 3) (30 points) An investor has $1,000 and two investment opportunities, X and Y. For each $100