State whether each of the following is true or false. Justify your answer:
(a) Every convergent alternating series is conditionally convergent. (b) Every absolutely convergent series is convergent. (c) Every convergent series is absolutely convergent. (d) Every alternating series converges. (e) If Σan is conditionally convergent, then Σ|an| diverges. (f) If Σ|an| diverges, then Σan is conditionally convergent.