Given this date: Current price of Common = $36. Most recent Market Return overall = 7%; Corporate Tax Rate = 35%. Growth rate of common dividends = 5%. Last years dividend = $1.60; Beta = 1.7; Risk-Free rate currently equals 2.5%. Retained Earnings represent 28.6% of the capital structure. Calculate the weighted after-tax cost of this Retained Earnings using the Capital Asset Pricing Model.