An all-equity company's cost of debt is 8.5% cost of equity is 13.6%. The company wants to borrow funds to buy back shares, which would result in a D/E ratio of 1.4 following the buyback. Assume all available earnings are immediately distributed to common shareholders and all the M&M assumptions are satisfied except the company's corporate tax rate is 18%. According to the M&M Propositions with taxes, what will be the cost of equity for this company after capital restructuring