please hell me

Suppose that XTel currently is selling at $50 per share. You buy 800 shares using $30,000 of your own money, borrowing the remainder of the purchase price from your broker. The rate on the margin loan is 8%. Required: a. What is the percentage increase in the net worth of your brokerage account if the price of X Tel immediately changes to (i) $55; (ii) $50; (ii) $45 ? (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 25%, how low an 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 $20,000 of your own money? (Round your answer to 2 decimal places.) d. What is the rate of return on your margined position (assuming again that you invest $30,000 of your own money) if X Tel is selling after one year at (i) $55 : (ii) $50; (ii) $45 ? (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.) e. Continue to assume that a year has passed. How low can XTel's price fall before you get a margin call? Note: Assume maintenance margin of 25% (Round your answer to 2 decimal places.)