A company is estimating its optimal capital structure. Now the company has a capital structure that consists of 20% debt and 80% equity, based on market values (debt to equity D/S ratio is 0.25). The risk-free rate (rRF) is 5% and the market risk premium (rM - rRF) is 6%. Currently the company's cost of equity, which is based on the CAPM, is 14% and its tax rate is 20%.

Find the firm's current leveraged beta using the CAPM

Find the firms unleveraged beta using the Hamada Equation

What would be the company's new leveraged beta if it were to change its capital structure to 50% debt and 50% equity (D/S=1.0) us the Hamada Equation?

What would the the firms new cost of equity if it were to change its capital structure to 50% debt and 50% equity (D/S=1.0) using the CAPM?