Subsonic-
>2. In the case that there were not enough life rafts. I can definitely assure you that there is enough for all the passengers even at full load. The life rafts at the aft doors were not inflated and only the ones in the FWD doors are inflated. ( as you can see in the pic, they have no choice but to stay on the wings, since they cant use the aft emergency slides which doubles up as a life raft when detached from the aircraft)
But that's what I'm saying - there may be plenty of rafts, but are there enough USABLE rafts? The rafts at the back doors aren't going to be of much use if the back doors won't open, or alternately, if you flood the aircraft opening them.