Following is information for the required returns and standard deviations of returns for A$,$ B$,$ and C$.$

Here are the expected returns and standard deviations for stocks A$,$ B$,$ and C:

$\backslash$table$[[$Stock$,$ri$,$si$],[$A$,7\mathrm{.}0\%,33\mathrm{.}11\%$