You have been offered a unique investment opportunity. If you invest $ 10 800 today, you will receive $ 540 one year from now, $ 1 620 two years from now, and $ 10 800 ten years from now. a. What is the NPV of the opportunity if the cost of capital is 5.9 % per year? Should you take the opportunity? b. What is the NPV of the opportunity if the cost of capital is 1.9 % per year? Should you take it now?