3. A firm is buying an adjacent 10-acre parcel for a future plant expansion. The price has been set at S30.000 per acre. The payment plan is 25% down, and the balance 2 years from now. If the transaction interest rate is 9% per year, what are the two payments? 4. An investment of 5,000 in biotech common stock proved to be very profitable. At the end of 5 years the stock was sold for 25,000. What was the rate of return on the investment? S. A woman went to the Beneficial Loan Company and borrowed $9000. She must pay $350 at the end of each month for the next 30 months. What is the monthly interest rate she is paying? What effective annual interest rate is she paying