Etini Corp. currently has 40 million shares outstanding and no debt. The current stock price is $15. . The firm plans to announce that it will borrow $100 million on a permanent basis, and use the fund to repurchase outstanding shares. The corporate tax rate is 20%. (a) What is the present value of the firm's interest tax shield? [5 pt.] (b) What is the total value of the firm after the announcement? [5 pt.] (c) What is the share price just after the announcement according to no-arbitrage pricing? [8 pt.] (d) What is the market value of the total assets just after the debt issuance, but before the share repurchase? [7 pt.]