show and explan ur work thank you

Consider the following information on computer peripheral companies STMicroelectronics STM, Synaptics SYNA and SuperMicro SMCI State of Economy Recession Nom al Boom Probability of State of Economy 25.0% 30.0% 55.0% Rate of Return if State Occurs STM SYNA SMCI -10.55% 8.35% -1.00% 14.22% 10.85% 15.90% 33.65% 13.60% 38.50% The market risk premium is 8% and the risk-free rate is 4.50%. Determine the expected return and standard deviation for each stock. Which stock has the most systematic risk? Which one has the most unsystematic risk? Which stock is riskier overall? (75 POINTS)