Please teach me the detailed steps with explanation. Not using excel or professional financial calculators. Thank you very much!

Consider the following information about Stocks I and II: State of Economy Recession Normal Irrational exuberance Probability of State of Economy 0.15 0.70 0.15 Rate of Return if State Occurs Stock I Stock II 0.20 -0.25 0.21 0.09 0.06 0.44 The market risk premium is 7 percent, and the risk-free rate is 4 percent. a) Which stock has the most systematic risk? b) Which one has the most unsystematic risk? c) Which stock is "riskier? Explain