urgent pls

4. De Trader opens a brokerage account and purchases 300 shares of Internet Dreams at $40 per share. She borrows $4,000 from her broker to help pay for the purchase. The interest rate on the loan is 8%. (4 Points) a. What is the margin in De's account when she first purchases the stock? b. If the share price falls to $30 per share by the end of the year, what is the remaining margin in her account? c. If the maintenance margin requirement is 30%, will she receive a margin call? d. What is the rate of return on her investment 5. You are bearish on Telecom and decide to sell short 100 shares at the current market price of $50 per share. (2 Points) a. How much in cash or securities must you put into your brokerage account if the broker's initial margin requirement is 50% of the value of the short position? b. How high can the price of the stock go before you get a margin call if the maintenance margin is 30% of the value of the short position