Question $6.(10$ points$)$ The following are estimates for two stocks as a result of regression of each stock onto the stock market index. $[[$Stock$,$Expected Return $\%,$Beta,Residual Error, or risk $\%],[$A$,11,1\mathrm{.}3,21],[$B$,9,0\mathrm{.}7,16]]$ The stock market index has a standard deviation of $18\%.$ Calculate the standard deviation for each stock. Calculate the covariance between stocks A$,$ and B$.$