b. The graph below shows the envelope frontier. Based on the graph below do you agree with the statement Portfolio P(1) and P(2) are two efficient portfolios"? Explain your answer. Portfolio Means and Returns 17% A 15% 13% Portfolio expected retrun Erp) 11% P(1) B B 9% P(2) 7% 5% 30% 35% 40% 45% 70% 75% 80% 85% 50% 55% 60% 65% Portfolio standard deviation Op [5 marks] C. Explain in detail all five propositions on envelope portfolios. [5 marks]