Suppose that XTel currently is selling at $$30$ per share. You buy $600$ shares using $$13,500$ of your own money, borrowing the remainder of the purchase price from your broker. The rate on the margin loan is $6\%.$ What is the rate of return on your margined position $($assuming again that you invest $$13,500$ of your own money$)$ if XTel is selling after one year at $($i$)$ $$33$; $($ii$)$ $$30$; $($iii$)$ $$27?$ 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 $25\%$