Question: required - A B C and D, pls provide full workings and explanation. need the excel sheet to be attached if possible or clippings. thank

required - A B C and D, pls provide full workings and explanation. need the excel sheet to be attached if possible or clippings. thank you
(30 Question marks) You are provided the returns in percentage for shares A and B. Year 2015 2016 2017 2018 2019 2020 Share A 16 5.5 -5 5 13 Share B 15 9 - 10 4 -6 10.5 Required a Compute the average (expected) return and volatility (standard deviation) for shares A and B b. Determine the covariance and the correlation coefficient between returns on A and returns on B. C. Calculate the expected return and standard deviation for a portfolio P of share A and share B, where the proportion invested in A is 50.28%. d. A second portfolio Q also comprise share A and share B, where the proportion invested in A is 10.00%. Discuss which portfolio is efficient
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