Based on the return profile of scenarios below: State of Economy Probability of State 0.1 0.6 0.3 Stock X 7% 4% 7% Stock Y -5% 3% 9% 3 a. What are the expected return for Stocks X and Y? b. What are the the standard deviations of returns on Stocks X and Y? c. What is the covariance between returns on these two stocks? The covariance formula is con(X, Y) = Ps ( X,-E(X) ( Y,-BW