Question 3 (7 Marks) Investments Plan Expected Return, E(r) Standard Deviation, 0.20 0.5 B 0.24 0.7 0.28 0.18 D 0.32 0.23 Utility function U = E(r) - 1/2A02 Based on the above utility function, which investment plan would Sarah choose if she was risk averse with A =5? What is the importance of "A" in the utility function? Show all your calculations. 7 marks