Information on stocks E&F which have a correlation coefficient of 0.5 appear below: Your uncle has savings of $20,000 and was thinking of investing 70% of this amount in stock E and the remainder in stock F. Required: a. Calculate the expected return and standard deviation of your uncle's portfolio. ( 5 marks) b. Demonstrate by appropriate calculations whether or not diversification has been achieved by combining these two stocks in a portfolio c. Your uncle is worried about taking risks as he is close to retirement age. Advise him on what actions he could take to establish a portfolio that is less risky. Provide calculations to show that the proposed portfolio is less risky