Assume that you have been hired as a consultant by Kruger Industrial Smoothing to estimate their weighted average cost of capital. Kruger$$s stock is currently selling for $$15\mathrm{.}25$ per share, and its noncallable $$1,000$ par value, $10-$year, $7\mathrm{.}80\%$ bonds with semiannual payments are selling for $$895\mathrm{.}00.$ Their beta is $1\mathrm{.}4,$ the yield on a $10-$year Treasury bond is $4\mathrm{.}50\%.$ The market risk premium is $5\mathrm{.}5\%$ and their tax rate is $25\%.$ Finally, Kruger$$s optimal capital structure is $25\%$ debt and $75\%$ equity.

What is Kruger$$s WACC?