3. You are bullish on ITC stock. The current market price is $100 per share, and you have $400,000 of your own to invest. You borrow an additional $800,000 from your broker at an interest rate of 3% per week and invest $1,200,000 in the stock. ITC pays no dividends. a. Suppose the price of ITC stock falls immediately after your purchase. The maintenance margin is 30%. How low can the price of ITC stock fall before you receive a margin call? b. After 2 weeks, calculate your rate of return if the price of ITC stock has gone up by 20%