An investment has the following characteristics: ATIRRP: After-tax IRR on total investment in the property: 9.0% BTIRRE: Before-tax IRR on equity invested: 17% BTIRRP: Before-tax IRR on total investment in the property: 12% t: Marginal tax rate: 0.40 What would be the break-even interest rate (BEIR), at which the use of leverage is neither favorable nor unfavorable