De Trader opens_a brokerage account and purchases 100 shares of Internet Dreams at $52 per share. She borrows $2,800 from her broker to help pay for the purchase. The interest rate on the loan is 7%. a. What is the margin in De's account when she first purchases the stock? Margin b-1. If the share price falls to $42 per share by the end of the year, what is the remaining margin in her account? (Round your answer to 2 decimal places.) Remaining margin % b-2. If the maintenance margin requirement is 30%, will she receive a margin call? No Yes c. What is the rate of return on her investment? (Negative value should be indicated by a minus sign