HOMEWORK II: Calculate average return, variance, standard deviation, and coefficient of variation for stock M

Ex$.4$ Calculating average return and standard deviation for a portfolio given historical data. You have the following information for three stocks for $2018-2023.$

Rate of Return $(\%)$

$\backslash$table$[[$Year$,$Stock M$,$Stock A$,$Stock B$,$Portfolio,$],[2020,15,25,10,17\mathrm{.}5,0\mathrm{.}5(25)0\mathrm{.}5(10)**$