Weighted Average Cost of Capital=(mkt value of equity/(mkt value of equity+debt)*required ROR on equity)*(mkt value of debt/(mkt value of debt+equity)*Before-tax cost of debt*(1-tax rate))
Since target debt-to-equity ratio is 0.3 that means 1.5 billion/equity=0.3 so rearranging it equity=1.5 billion/0.3=5 billion
now plugging it all in
WACC=5/6.5*.12*1.5/6.5*.025*(1-.18)
=9.7%-Answer A