Problem 4-02 You purchase 60 shares for $30 a share ($1,800), and after a year the price falls to $25. Calculate the percentage return on your investment if you bought the stock on margin and the margin requirement was (ignore commissions, dividends, and interest expense); a. 25 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place. % b. 35 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place. % c. 85 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place. % hs