a. To maximize your expected return without increasing your volatility, which portfolio would you invest in? Explain your answer.

b. To keep your expected return the same but minimize your risk, which portfolio would you invest in? Explain your answer.

c. Which portfolio is not possible to invest in? In other words, which portfolio is impossible to construct? Explain your answer.

Please show all work and solve in excel if possible, thank you!

You have $100 invested in Portfolio P in the Figure below. It has E[Rp]=10.5% and SD(Rp)=8%. Assume rf=5%, and the tangent portfolio, Portfolio T, has an expected return of 18.5% and a volatility of 13%. Note that each black dot represents a portfolio