please show complete work with formula on excel.

WK 5(2) PROBLEM 2 The University of Maryland Nursing Home, a single not-for-profit facility, is estimating its corporate cost of capital. Its tax-exempt debt currently requires an interest rate of 6.2 percent, and its target capital structure calls for 60 percent debt financing and 40 percent equity (fund capital) financing. The estimated costs of equity for selected investor-owned healthcare companies are given below: GlaxoSmith Kline Beverly and Golden Living Centers HCA Humana 15.0% 16.4% 17.4% 18.8% a. What is the best estimate for UofM's cost of equity? b. What is the firm's corporate cost of capital