8. You conduct the following scenario analysis: Economy Very good Good Average Bad Very bad ProbabilityPortfolio X 0.1 0.2 0.4 0.2 0.1 25% 10% 5% -5% -15% Portfolio Y 40% 15% 090 -20% -50% a. What are the expected return and standard deviation of portfolio X and Y? b. What are the Sharpe ratios of the portfolios based on scenario analysis, risk free rate is 190