I am entering =NPV(D11, D6:D9) and it is not correct. Why ?

A B D E F G H I K 1 2 3 What is the NPV of the following cash flows at a discount rate of zero percent? What if the discount rate is 10 percent? If it is 20 percent? If it is 30 percent? 4 5 6 7 Year 0 Year 1 Year 2 Year 3 A A A A (13,900) 6,400 8,700 5,900 8 9 10 11 12 Discount rate Discount rate Discount rate Discount rate 0% 10% 20% 30% 13 14 15 16 17 Complete the following analysis. Do not hard code values in your calculations. You must use the built-in Excel function to answer this question. 18 19 NPV at O percent 20 21 NPV at 10 percent