10. You purchased 50 shares of Amazon.com common stock on margin at $600 per share. Assume the maintenance margin requirement is 0.6. You received a margin call when the share price dropped to $300. What is your initial margin requirement? 11. At the beginning of the month, you sell short 200 shares of Wells Fargo that are currently selling at $50 per share. One month later you cover your short position at $54 per shares. During the month, Wells Fargo issued $1 dividend per share. What is you return during this month? 12. You sell short 200 shares of Wells Fargo \&Co that are currently selling at $60 per share. You post the 0.5 margin required on the short sale. If your broker requires a 0.4 maintenance margin, at what stock ptice will you get a margin call? (You earn no interest on the funds in your margin account, and the firm does not pay any dividends.) 13. You purchased 50 shares of Amazon.com common stock on margin at $300 per share. Assume the initial margin is 0.55 and the maintenance margin is 0.4. You will get a margin call if the stock drops below (Assume the stock pays no dividends, and ignore interest on the margin loan