please show formulas. no excel work thank you

You have done your research for the following investments and your friend has provided their ex-ctations for the markets for next year. Probability of State of State of Stock Stock Stock Stock Economy Economy A B D T-bills Boom .30 20% 25% 20% -10% 3% Normal .40 15% 12% 16% 15% 3% Recession .30 -16% -15% -8% 25% 3% Remember to show all of your work Calculate the eynertad return Stock Market 20% 15% -8% 8. Calculate the risk for stock A. (2 marks) h. Calculate the risk for stock B. (2 marks) 1. Calculate the risk for stock C. (2 marks) J. Calculate the risk for stock D. (2 marks) k. Calculate the risk for T-bills. (2 marks) 1. Calculate the risk for the stock market. (2 marks)