can someone please show me how they reached the answer to each section of the question it would help with my studying. Please and Thanks in advance! Question has been updated

Suppose that Xtel currently is selling at $50 per share. You buy 900 shares using $36,000 of your own money, borrowing the remainder of the purchase price from your broke The rate on the margin loan is 7% a. What is the percentage increase in the net worth of your brokerage account if the price of Xtel immediately changes to (a) $56. (b) S50: (c)$44? (Leave no cells blank be certain to enter "0" wherever re your answers to 2 decimal places.) a Percentage gain b Percentage gain c Percentage gain b. If the maintenance margin is 20%, how low can Xtel's price fall before you get a margin call? (Round your answer to 2 decimal places.) Price