$17.$ You are attempting to estimate the cost of capital for a new project. Your firm has a current debt$-$to$-$equity ratio of $1\mathrm{.}4$ and faces a corporate tax rate of $35\%.$ Given that your equity is priced to yield $15\mathrm{.}9\%$ EAR and your debt yields on average $7\mathrm{.}1\%$ p$.$a$.,$ what is the estimated cost of capital for your firm?

Please report your answer so that if your WACC is $10\%$ you enter the value $10($without decimal notation, not $0\mathrm{.}10).$