1.Calculating the Return on Investment. Dave bought a rental property for $200,000 cash. One year later, he sold it for $240,000. What was the return on his $200,000 investment?

2.Calculating the Return on Investment Using Financial Leverage. (Refer to problem 1.) Suppose Dave invested only $20,000 of his own money and borrowed $180,000 interest-free from his rich father. What was his return on investment?"