An investor provides you with the following information for two risky assets

An investor provides you with the following information for two risky assets: Securities Q S Expected return 20% 30% Standard deviation 15% 25% The correlation between the two securities is - 0.20. REQUIRED (a) Given that the investor initially decides to invest 45% of his wealth in security Q and 55% in security S, calculate the expected return and risk of the investor's portfolio. [10 Marks] (b) Calculate the proportion that needs to be invested on asset Q to achieve the minimum variance portfolio. [8 Marks] (c) Estimate the Sharpe Ratio of the securities and initial portfolio, assuming a risk free rate of 3%. [6 Marks] (d) Explain the main limitations of portfolio theory