du Given the following schedules, which is firm's optimal capital structure where the cost of capital is lowest? debt/assets cost of cost of debt equity 0% 7% 14% 10 7 14 20 7 14 30 8 14 40 8 16 50 10 18 60 12 20 which is prm's optimal capital structure? What is the weighted average cost of capital at optimal capital structure? debt/asset - 30%, WACC-12 20 O debt/asset = 20%, WACC=12.60 O debt/asset = 30%, WACC=12.60 O debt/asset = 20%, WACC-12.20