based on the following data; calculate the expected return and the standard deviation of returns for each stock. calculate the expected rate and standard deviation on the portfolio where the portfolio is formed by investing 60% of the funds in stock a and the rest in b

Just need to know how to do part B for number 7

Stock X Rate of Return 200X 200Y 200Z -5% 15% 30% 7. Based on the following data; calculate the expected return and the standard deviation of returns for each stock. State of the Economy Probability Stock A Rate of Return Stock B Rate of Returrn Recession Normal Growth Boom 0.25 0.45 0.3 6% 7% 11% -20% 13% 29% b) Calculate the expected return and the standard deviation on the portfolio, where L, the portfolio is formed by investing 60% of the funds in Stock A and the rest in Stock B