Suppose that XTel currently is selling at $30 per share. You buy 600 shares using $12,600 of your own money, borrowing the remainder of the purchase price from your broker. The rate on the margin loan is 10%. Required: a. What is the percentage increase in the net worth of your brokerage account if the price of XTel immediately changes to (1) $33; $30 : (ii) $27 ? (Leave no cells blank - be certain to enter " 0 " wherever required. Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.) b. If the maintenance margin is 30%, how low can XTel's price fall before you get a margin call? (Round your answer to 2 decimal places.) c. How would your answer to requirement b would change if you had financed the initial purchase with only $9,000 of your own money? (Round your answer to 2 decimal places.)