could you please answer this in a finance way with the formula's and equations

1. Consider the following information: State Probability A B Boom 0.6 20% -5% Bust 0.4 -10% 10% a. What are the expected return and standard deviation of stock A and stock B? (10%) b. If you invest 50% of your money in stock A and 50% of your money in stock B, what are the expected return and standard deviation for the portfolio as a whole (considering both states of the economy)? (10%) e. Use the results of a-e to explain the benefit of diversification. (5%) (Underline your final answer for a, b and e, e.g., Ans.: XXXX)