SIROM Scientific Solutions has $$5$ million of outstanding equity and $$10$ million of bank debt. The bank debt costs $4\%$ per year. The estimated equity beta is $2.$ If the market risk premium is $9\%$ and the risk$-$free rate is $4\%,$ compute the weighted average cost of capital if the firm's tax rate is $35\%.$

A$.10\mathrm{.}43\%$

B$.9\mathrm{.}52\%$

C$.9\mathrm{.}97\%$

D$.9\mathrm{.}07\%$