The first task in your job as financial analyst is to update your firm's unlevered cost of capital. The company has a target capital structure of $26\%($D$/$V$).$ The cost of debt is $4\mathrm{.}00\%$ and the cost of equity is $10\mathrm{.}00\%.$ The marginal tax rate is $30\mathrm{.}00\%.$ The current Enterprise Value of the Firm $($V$)$ is $$10,000.$ What is the unlevered cost of capital the closest to$?$