13.14. Derive the WACC formula in terms of first-year property, equity investor and lender yields (i.e. current income yield components of return). (Hint: Start with the identity Property cash flow=Debt cash flow + Equity cash flow, which you can write as PBTCF=DS + EBTCF. Divide each side by V, then multiply DS by (L/L) and EBTCF by (E/E). You should have no trouble finishing from here.]