Please solve this question fast, need within 20 minutes

Q2) Consider the following information given below and do the following; a) Estimate monthly expected returns and the associated risk (Standard devistion) for each of the company A,B C securities b) Rank securities of company A, B, and C from the most preferred to the least preferred, assuming that the rational investor behavior holds. Year Return of Company A Return of Company B Return of Company C 4.20% 4.08% 1.07% -2.71% -2.73% -5.44% 3 4.15% 18.12% 0.74% 4 3.68% 1.60% -10.78% Marks (6+3=9)