2. For assets purchased or sold on margin, any market price in the range of trigger prices results in a margin call (i.e, the investor must pay additional funds into the margin account, the amount of the call depending on the level to which the margin must be restored). Calculate the range of trigger prices in each of the following cases: a An investor purchases 200 shares at price $15 per share, with an initial margin of 60% and a maintenance margin of 50%. b An investor short-sells 100 shares at price $20 per share, with an initial margin of 40% and a maintenance margin of 25%