(2 points) For each of the following series, tell whether or not you can apply the 3-condition test (i. e. the alternating series test). If you can apply this test, enter D if the series diverges, or C if the series converges. If you can't apply this test (even if you know how the series behaves by some other test), enter N. 1. ∑n=1[infinity](−1)ncos(nπ)n5 2. ∑n=1[infinity](−1)nn!nn 3. ∑n=1[infinity](−1)! D 4. ∑n=1[infinity](−1)nn2+5 5. ∑n=1[infinity](−1)nenn! 6. ∑n=1[infinity](−1)nn!en