25. Suppose that you sell short 500 shares of XTel, currently selling for $40 per share, and give your broker $15,000 to establish your margin account. (LO 3-4) a. If you earn no interest on the funds in your margin account, what will be your rate of return after one year if XTel stock is selling at (i) $44; (ii) $40; (ii) $36? Assume that XTel pays no dividends. If the maintenance margin is 25%, how high can XTel's price rise before you get a margin call? c. Redo parts (a) and (b), but now assume that XTel also has paid a year-end dividend of $1 per share. The prices in part (a) should be interpreted as ex-dividend, that is, prices after the dividend has been paid