You have been offered a unique investment opportunity. If you invest $9,600 today, you will receive $480 one year from now, $1,440 two years from now, and $9,600 ten years from now. a. What is the NPV of the opportunity if the cost of capital is 6.8% per year? Should you take the opportunity? b. What is the NPV of the opportunity if the cost of capital is 2.8% per year? Should you take it now? a. What is the NPV of the opportunity if the cost of capital is 6.8% per year? If the cost of capital is 6.8% per year, the NPV is $ (Round to the nearest cent.) Should you take the opportunity? (Select from the drop-down menu.) You take this opportunity. b. What is the NPV of the opportunity if the cost of capital is 2.8% per year? If the cost of capital is 2.8% per year, the NPV is $. (Round to the nearest cent.) Should you take it now? (Select from the drop-down menu.) You take this opportunity at the new cost of capital