Security market line

a. What is the portfolio beta for your proposed investment portfolio? b. How would a 25 percent increase in the expected return on the market impact the expected retuen of your portlolio? c. How would a 25 percent decrease in the expected return on the market impact the expected return on each asset? d. If you are interesled in decreasing the beta of your portfolio by changing your portsolio allocation in two stocks, which stock would you decrease and which would you increase? Why