north star inc. uses a capital structure comprising $60\%$ common stock and $40\%$ debt. the beta of norths star stock is $1\mathrm{.}25,$ the expected market return is $12\mathrm{.}5\%,$ and the risk free rate is $5\mathrm{.}5\%.$ North's star bonds are trading at $$975,$ have a couon rate of $6\mathrm{.}2\%$ with semiannual payments, and par value of $$1000.$ The bonds will mature in $15$ years. If the corporate tax rate is $21\%,$ what is the WACC?