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Suppose you are a retiree. You are considering investing in buying shares but you do not want to 'put all eggs in one basket'. Therefore, you are planning to invest in the following different stocks. Required: a) Calculate the expected return on this portfolio. (4 marks) b) What is the Beta of this portfolio? (6 marks) c) Does this portfolio have more or less systematic risk than an average asset? ( 2 marks)