Evaluate the geometric series or state that it diverges. 16) a ) 1 + 3 + Oo + . b) _ (-1)n-1 4 C) 1 d) E 7 n=1 7n 7n n=6 5n n=1 e) 1 + (-5) + (-5)2+ (-5)3 + (-5)4+ ... f) > 5(2)n 3n n=3