Below is the monthly share price data for Westpac Banking Corporation (ASX code WBC.AX) for 2021 (Source: https://finance.yahoo.com) Westpac paid a dividend of $0.58 per share on 13 May 2021 and a dividend of $0.60 per share on 5 November 2021 a. Calculate the monthly percentage returns for WBC for 2021(including the dividends paid). (Show answer correct to six decimal places.) (6 marks) b. Calculate the average monthly return (\%) for WBC. (Show answer correct to six decimal places) (1 mark) c. Calculate the risk measured by the standard deviation for WBC. (Show answer correct to six decimal places) (8 marks) d. If the correlation between WBC shares and ANZ Bank shares is 0.9989 what level of diversification will you be able to achieve if you create a portiolio consisting of only these two shares? Explain with equations and graph. (Word limit 250 words) ( 5 marks)