You bought 100 shares of stock DE at $170 per share in your margin account that has an initial margin of 60%.

a. What would be the debt balance?

b. What would be the return on your initial investment if the price rises to $185?

c. If the maintenance margin is 40%, how low the price could drop before you receive a margin call?

d. If the price dropped to $110, how much money do you need to put in the account to keep the minimum maintenance margin?