answer all a, b, and c please

Q3. An investor wants to form a portfolio of two securities that should give minimum risk. He identified five securities- A, B, C, D, and E to select two out of these. Year ending share prices of the securities and the market index are shown in the following table. Year Market Index 8,542 8,956 9,584 9,254 9,658 9,245 9,365 9,784 9,784 9,965 Share price: Share price: Share price: Share price: Share price: BANC D 472572 50 150 3082 | 60 1443284 48 482877 503582 453088 57 504590 70 6247 78 78 1168398075 1744088 80 Transfer this data set into MSExcel and answer the following questions: a. Suggest the two securities for the portfolio so that the portfolio should have the minimum risk. b. Calculate portfolio return and risk. c. Suggest the proportion of investment in each security so that the portfolio has the minimum risk