Suppose that the index model for stocks A and $B$ is estimated from excess returns with the following results:

$R_A=4\mathrm{.}5\%+1\mathrm{.}40R_M+e_A$

$R_B=-2\mathrm{.}2\%+1\mathrm{.}7R_M+e_B$

${}_M=24\%$;$R-$square $A=0\mathrm{.}30$;$R-$square ${?}_{(}()()B)=0\mathrm{.}20$

What is the standard deviation of each stock? $($Do not round intermediate calculations. Round your answers to $2$ decimal places.$)$