You decide to short 100 shares of Tesla Motors Inc. (NASDAQ: TSLA) in your margin account. The market price right now is $245. The initial margin requirement is 50%. The maintenance margin requirement is 30%. Answer the following questions before you make an investment decision. Show your calculations. (12 points)

1. At what price will you get a margin call? (2 points)
2. If the price of TSLA decreases to $220, what is the margin ratio in the margin account? What is the rate of return of your investment? (3 points)
3. If the price of TSLA increases to $300, will you receive a margin call? If so, how much extra funds you need to deposit in your margin account to prevent brokers from liquidating your stocks? If you do not have extra funds, how many shares of TSLA the broker will force you to cover? (7 points)