a$)$ What is the market risk premium and risk free rate of return $($CAPM$)$

$\backslash$table$[[,$ER$,$ST Dev,Beta$],[$A$,5\mathrm{.}00\%,25\mathrm{.}00\%,0\mathrm{.}5],[$B$,11\mathrm{.}00\%,18\mathrm{.}00\%,1\mathrm{.}5],[$MP$,8\mathrm{.}00\%,15\mathrm{.}00\%,1]]$