You have been offered a unique investment opportunity. If you invest $10,000 today, you will receive $500 one year from now, $1,500 two years from now, and $10,000 ten years from now. a) What is the NPV of the opportunity if the interest rate is 6% per year? Should you take the opportunity? b) What is the NPV of the opportunity if the interest rate is 4%per year? Should you take it now?