in exel if possible

Consider the following states of outcomes, probabilities, and expected returns on only ce in your portfolio; X, Y, and Z. State Probability Boom Semi-Boom Normal Mild-Recession Full-Recession ?? 0.05 -12% a. What is the expected return of the portfolio if $25,000 is invested in X, S35,000 in Y, and $30,000 invested in stock Z? b. What are the standard deviations of stocks X, Y, and Z