Suppose you know the returns distribution of stock X and Y over the next year: Bear Normal Bull 0.2 0.3 0.5 Probability Stock X Stock Y -20% -15% 18% 50% 20% 10% a) What are the expected rates of return for stock X and stock Y? b) What are the standard deviations of returns on stock X and Y? c) Assume that of your $10,000 portfolio, you invest $9,000 in Stock X and $1,000 in stock Y. What is the expected return on your portfolio