You purchase 100 shares for $50 a share ($5,000), and after a year the price rises to $60.

You purchase 100 shares for $50 a share ($5,000), and after a year the price rises to $60. What will be the percentage return on your investment if you bought the stock on margin and the margin requirement was (a) 25%, (b) 50%, and (c)75%? (ignore commissions, dividends, and interest expense)I also have to show how I got the answers to the questions!