Решить задачу

Mrs Jones has invested her savings in an investment fund Omega. Omega’s expected return is 15% and its volatility is 5%. The fund’s asset manager suggests Mrs Jones to purchase new stocks whose expected return is 9% and volatility is 25%. Their correlation with the portfolio Omega amounts to 30%.
1. What is the beta of an asset?
2. Compute the beta of the new stocks
3. As the risk-free interest rate is 2%, would you advise Mrs Jones to buy those new stocks?