Problem 4-02 You purchase 60 shares for $70 a share ($4,200), and after a year the price falls to $65. 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. 15 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place. % b. 45 percent. Use a minus sign to enter the amount as a negative value. Round your answer to one decimal place. % c. 75 percent. Use a minus sign to enter the amount as a negative value. Round a your answer to one decimal place. %