A company has a beta of $1\mathrm{.}8,$ pre$-$tax cost of debt of $5\%$ and an effective corporate tax rate of $20\%\mathrm{.}40\%$ of its capital structure is debt and the rest is equity. The current risk$-$free rate is $1\mathrm{.}5\%$ and the expected market return is $5\mathrm{.}5\%.$ What is this company's weighted average cost of capital? Answer in percent, rounded to one decimal place.