Solve for all the parts, please.

Q8, The volatility of the market portfolio is 10%. The expected return on the market is 12%, and the risk-free rate of interest is 4%. Use the following information to answer the question(s) below. Firm Portfolioweight Volatility Correlation w/ Market Portfolio A .25 14% .7 B 18% .6 15% .5 .35 .40 1. Determine the beta for the portfolio of the three above stocks. (10 pts.) 2. Determine the expected return on the portfolio of the three above stocks. (10 pts.) 3. Determine the Sharpe ratio for firm C. (10 pts.)