$10.)$ Olivanders has earnings before interest and taxes of $$800,000.$ Both the book and the market value of debt is $$433,000.$

The unlevered cost of equity is $14$ percent while the pre$-$tax cost of debt is $7$ percent. The tax rate is $35$ percent. What is the firm's weighted average cost of capital?

$$a$.11\mathrm{.}48\%$

$$b$.13\mathrm{.}45\%$

c$.12\mathrm{.}65\%$

$$d$.16\mathrm{.}62\%$

e$.14\mathrm{.}01\%$