Problem 3-7 Old Economy Traders opened an account to short sell 2,600 shares of Internet Dreams at $73 per share. The initial margin requirement was 50% (The margin account pays no interest.) A year later, the price of Internet Dreams has risen from $73 to $80, and the stock has paid a dividend of $4.00 per share. a. What is the remaining margin in the account? (Round your answer to the nearest whole number.) Remaining margin b. If the maintenance margin requirement is 30%, will Old Economy receive a margin call? Yes O No c. What is the rate of return on the investment? (Round your answer to 2 decimal places. Negative value should be indicated by a minus sign.) Rate of return %