You have been offered a unique investment opportunity. If you invest $9,900 today, you will receive $495 one year from now, $1,485 two years from now, and $9,900 ten years from now. a. What is the NPV of the opportunity if the cost of capital is 6.1% per year? Should you take the opportunity? b. What is the NPV of the opportunity if the cost of capital is 2.1% per year? Should you take it now