please tell how to do part 3, 4 and 5

3. PofCo Inc.is a publicly traded firm with levered firm's value of 900,000. The firm has a D/E ratio of 0.5, the required return on levered equity is 12%, the cost of debt (which is considered debt-free) is 8% and the corporate tax rate is 25%. The firm has 10,000 shares outstanding. 1. What is the WACC of the levered firm? (write without % - 12.2% should be entered as 12.2) 2. What is the return on unlevered equity? Suppose the firm wants to reduce its debt by 100,000 3. What is the share price after the restructuring announcement? 4. How many new shares will need to be issued to pay down this debt? (round to integer) 5. What is the equity value after restructuring? 6. What is the firm value after restructuring? 7. What is the required return on levered equity after the change in capital structure? 8. What is the post-restructuring WACC