suppose that xtel currently is selling at $58 per share. you buy 250 shares using $10,000 of your own money, borrowing the remainder of the purchase price from your broker. the rate on the margin loan is 5%. a. what is the percentage increase in the net worth of your brokerage account if the price of xtel immediately changes to: (i) $62.64; (ii) $58; (iii) $53.36? what is the relationship between your percentage return and the percentage change in the price of xtel?