Hi how would you determine the standard deviation for security A and Security B

22. Use the following information to answer the question. Assume two possible states only. State Probability Return on Return on Security A Security B Boom 0.3 15% 12% Recession 0.7 10% 8% What is the standard deviation of a portfolio that is made up of 40% in stock A and 60% in stock B? Choose the nearest or best answer. Hint: no correlation is required. Start by determining the return for the portfolio in a boom and then in a recession. Then based on your calculations, proceed to calculate the standard deviation as you would for a single security. A. 1.46% B. 2.02% C. 2.89% D. 3.15%