Maria​ Gonzalez, Ganado's Chief Financial​ Officer, estimates the​ risk-free rate to be 3.50%​, the​ company's credit risk premium is 4.20​%, the domestic beta is estimated at 1.07​, the international beta is estimated at 0.74​, and the​ company's capital structure is now 35​% debt. The expected rate of return on the market portfolio held by a​ well-diversified domestic investor is 9.50​% and the expected return on a larger globally integrated equity market portfolio is 8.50%. The​ before-tax cost of debt estimated by observing the current yield on​ Ganado's outstanding bonds combined with bank debt is 7.90​% and the​ company's effective tax rate is 35​%. For both the domestic CAPM and​ ICAPM, calculate the​ following:
a.​ Ganado's cost of equity
b.​ Ganado's after-tax cost of debt
c.​ Ganado's weighted average cost of capital