7. ABC stock is currently selling for $467 per share. Suppose that you buy 100 shares of ABC with $30,000 of your own money and you have borrowed the reminder from your broker. The rate on the margin loan is 6%. Your broker requires an initial margin of 50 percent and a maintenance margin of 30 percent. a. What is the rate of return on your margined position if ABC is selling after one year at $527? (Hint: Please take your interest expense into account.) b. At what price and below would you receive a margin call? (You can ignore the interest incomes or expenses in the margin account)