a firm has a bond that matures in $8$ years, pays a $7\%$ coupon semi$-$annually. The original loan amount was $$1$ million. The current YTM$=4\%.$ It has $700,000$ shares of common stock, each trading at $$4.$ The beta of the firm $=0\mathrm{.}9,$ the market risk premium$=6\%,$ and the risk$-$free rate $=1\%.$ Assume a tax rate $=23\%,$ what is the firms WACC?