I am severly confused on Question 8-1. Please help!

8-1 EXPECTED RETURN A stock's returns have the following distribution: blems Rate of Return if This Demand Occurs Demand for the Company's Products Weak Below average Average Above average Strong Probability of This Demand Occurring 0.1 0.1 0.3 0.3 0.2 (30%) (14) 20 45 Calculate the stock's expected return, standard deviation, and coefficient of variation. 8-2 PORTFOLIO BETA An individual has $20,000 invested in a stock with a beta of 0.6 and another $75,000 invested in a stock with a beta of 2.5. If these are the only two investments in her portfolio, what is her porta? REQUIRED RATE OF RETURN on the market is 12%. What is the required rate of return on a stock with a beta of 2? EXPECTED AND REQUIRED RATES OF RETURN the market risk premium is 4%. What is the required return for the overall stock market? What is the required rate of return on a stock with a beta of 0.8? BETA AND REQUIRED RATE OF RETURN rate is 4.5%, and the market risk premium is 3%. a. What is the stock's beta? b. If the market risk premium increased to 5%, what would happen to the stock's required 8-3 nde hatthe ride free rate is 5.5% and the required return i.. 8-4 Assume that the risk-free rate is 3.5% and 8-5 A stock has a required return of 9%, the risk-free rate of return? Assume that the risk-free rate and the beta remain unchanged