help me

KM Company is currently an all-equity firm with 20 million shares outstanding and a stock price of $7.50 per share. Although investors currently expect KM to remain an all- equity firm, KM plans to announce that it will borrow $50 million and use the funds to repurchase shares. KM will pay interest only on this debt, and it has no further plans to increase or decrease the amount of debt. KM is subject to a 40% corporate tax rate. a. What is the market value of KM's existing assets belore the announcement? b. What is the market value of KM's assets (including any tax shields) just after the debt is issued but before the shares are repurchased? c. What is KM's share price just before the share repurchase? How many shares will KM repurchase? d. What are KM's total equity value and share price after the share repurchase