regarding marks deduction in bank loan case study

15 marks are deducted just for not performing correlation analysis. Actually, I am having problem in doing correlation analysis because tableau does not provide a built in correlation matrix , and to analyze correlation , I have to create calculated field but there are lot of columns , so it is very difficult to do so, that's why I was unable to perform correlation analysis. Also, I have tried doing in excel but analysis toolpak is not working in excel. Please consider the issue, 15 marks are deducted only because of correlation analysis. I have done all the other steps.