(Security market line) Your father just learned from his financial advisor that his retirement portfolio has a beta of 1.89. He has turned to you to explain to him what this means. Specifically, describe what you would expect to happen to the value of his retirement fund if the following were to occur: a. The value of the market portfolio rises by 10 percent. b. The value of the market portfolio drops by 10 percent. c. Is your father's retirement portfolio more or less risky than the market portfolio? Explain. a. If the value of the market portfolio rises by 10%, then the value of your father's retirement fund should by \%. (Select from the drop-down menu and round the answer to two decimal places.) (Security market line) You are considering the construction of a portfolio comprised of equal investments in each of four different stocks. The betas for each stock are found below: (Click on the icon b in order to copy its contents into a spreadsheet.) 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 return of your portfolio? 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 interested in decreasing the beta of your portfolio by changing your portfolio allocation in two stocks, which stock would you decrease and which would you increase? Why? a. The portfolio beta for your proposed investment portfolio is (Round to three decimal places.)