The following table shows the past daily returns for $3$M and AAL

a$.$ Please find the expected return, standard deviation and coefficient of variation for EACH stock and a Portfolio that puts $20\%$ weight on $3$M and $80\%$ weight on AAL.

b$.$ Please calculate the geometric mean of the returns for $3$M$,$ AAL, and the portfolio separately.

c$.$ To minimize the coefficient of variation of the portfolio, how much weight should be assigned for $3$M$?$