21. Below is selected data about Power Devices, Inc. and relevant market information (12 points) Beta of common stock 1.25 Treasury bond rate 2% Required return on market portfolio (Rm) 8% Yield to maturity on long-term debt 6.0% Book value of equity $400 million Market value of equity $750 million Long-term debt outstanding $500 million Corporate tax rate 25% a. What is the company's cost of equity? b. What is its cost of debt? c. What is the company's Weighted Average Cost of Capital