Can you help me understand these questions thanks.

HW-EC420-Due: October 26. 2021 1 . Alice is risk-averse and has 60% of her wealth invested in risky stocks which have a standard deviation of o., = 0.25(25%) and an expected return of R = 0.05-5%. The other 40% of her wealth is allocated to risk-free T-bonds. The risk-free interest rate on T-bonds is R, = 0.02 = 2%. a. What is Alice's expected return on her portfolio? b. What is the standard deviation of the portfolio (6,, )? C. Given her current allocation of wealth to stocks and bonds. Alice's marginal rate of substitution MRS = AR / 46 =0.10. Has Alice maximized utility? If not, should Alice increase or decrease the share of wealth allocated to stocks? Explain. 2. The current risk-free return on T-bonds is RF-0.02 and the expected return on a risky stock portfolio is RM=0.06. If an investor desires a 3% return on their portfolio, what share of wealth should be allocated to stocks