$4.$MinWACC Inc., which currently has a capital structure that is $40\%$ debt and $60\%$ equity, has an asset beta of $1\mathrm{.}55.$ What is the firm's equity beta? Ignore taxes.a$)1\mathrm{.}352$ b$)4\mathrm{.}079$c$)\mathrm{.}930$d$)3\mathrm{.}875$e$)2\mathrm{.}583$