assume that you hold a well-diversified portfolio that has an expected return of 14.24% and a beta of 1.20. you are in the process of buying 1,000 shares of alpha Corp at $10 share and adding it to your portfolio. alpha has an expected return of 22.5% and a beta of 1.20. the total value of your current portfolio is $90,000..what will the expected return and beta on the portfolio be after the purchase of the alpha stock?