You have been offered a unique investment opportunity. If you invest $20,000 today, you will receive $1,000 one year from now, $3,000 two years from now, and $20,000 ten years from now. a. What is the NPV of the investment opportunity if the interest rate is 8% per year? Should you take the opportunity? b. What is the NPV of the investment opportunity if the interest rate is 4% per year? Should you take the opportunity? a. What is the NPV of the investment opportunity if the interest rate is 8% per year? The NPV of the investment opportunity if the interest rate is 8% per year is $. (Round to the nearest dollar.)