How do I solve these by hand? Thanks

Complete the following questions by hand. Do not use a spreadsheet. Do the answers using pencil and paper and submit them on Thursday, November 8, in class. 1. Using the following returns, calculate the average returns, the variance and standard deviations for X and Y. Also, compute the average returns, the variance and standard deviations if you invest 40% in X and 60% in Y. Yr Rx Ry 16 5 -5 3 15 4 2. Using the following returns, calculate the average returns, the variance and standard deviations for X and Y. Also, compute the average returns, the variance and standard deviations if you invest 40% in X and 60% in Y. Ry Prob Rx 0.3 0.4 0.3 5 16 15 MacBook Air