3. Consider a complete portfolio, C, invested in a risky portfolio, P, and risk-free T-bills with the following property: Risky portfolio: E(rp) = 18%, p = 28% T-bills: r; = 8%, 01 = 0% (a) Suppose the investor chooses to invest 70% of portfolio in the risky portfolio. What is the expected return of the rate of return on her portfolio? (b) What is the standard deviation on her portfolio return? (c) What is the Sharpe ratio of her portfolio? (d) Draw the CAL of her portfolio on an expected return-standard deviation diagram. What is the slope of the CAL? Show the position of her portfolio. (e) Suppose that the investor decides to invest in the risky portfolio a proportion y of the total investment budget so that overall portfolio will have an expected rate of return of 16%. What is the investment proportion y? (f) Suppose that the investor prefers to invest in the risky portfolio a proportion y that maximizes the expected return on the complete portfolio subject to the constraint that the overall portfolio's standard deviation will not exceed 20%. What is the investment proportion y