Based on the following information, compute the company$$s weighted average cost of capital $($WACC$).$

Stock price $$25$ Fully diluted shares outstanding: $700$ million

Market value of debt $$19\mathrm{.}5$ billion Risk free rate: $5\mathrm{.}5\%$

Company tax rate $20\%$ Market risk premium: $4\mathrm{.}0\%$

Current yield on debt $7\mathrm{.}5\%$ Company$$s stock beta: $1\mathrm{.}5$

Group of answer choices

a$.8\mathrm{.}3\%$

b$.12\mathrm{.}2\%$

c$.8\mathrm{.}6\%$

d$.7\mathrm{.}2\%$