Problem

$2$ Find their unleverd betas

$3$ Average unleverd betas of these three firms is a good approximation of the unleverd beta of your firm, Firm$4$

$4$ Your firm $($Firm$4)$ has a debt$/$equity ratio of $0\mathrm{.}2.$

$5$ Find the levered beta of your firm $($Firm$4)$