4. (1 point) Determine whether this geometric series converges or diverges. If it converges, find its sum. (-3)n+1 M An-1 n=1 5. (1 point) Determine whether this series converges or diverges by alternating series test. (-1)n+1 n=1 n2 5) 6. (1 point) Determine whether this series converges or diverges by ratio test. (-1)" (n!) (2n)! 6)