You are estimating the weighted average cost of capital $($WACC$)$ for your company based on the following information:

Equity information $50$ million common shares outstanding $$80$ market price per share Stock beta of $1\mathrm{.}15,$ Market risk premium of $9\%$ Risk$-$free rate of $5\%$

Debt information $$1$ billion of debt at face value Debt quoted price $=110$ Coupon rate $=9\%,$ semi$-$annual $15$ years to maturity Marginal tax rate of $40\%$

Calculate the following returns: $(1/100$ of one percent without $\%$ sign, e$.$g$.12\mathrm{.}671,$ if a negative percentage, $-9\mathrm{.}56).$

$1.$ Cost of equity $(\%)$:

$2.$ Cost of debt $(\%)$:

$3.$ Proportion of debt $(\%)$:

$4.$ Proportion of equity $(\%)$:

$5.$ Weighted average cost of capital $(\%)$: