3 n2 ii. En=1 ni [6 points each] Determine whether the following series converge or diverge. You may use any of the tests covered so far in class (including those from previous sections). Remember to show your work. 3n3+5n-1 a ) En=1 -2n3 +67 2 - 1 b) En=1(-1)n . n2-1 n3 +1 2k-1.3k+1 c Zn=1 4k K