Assume that the number of packets n in a slotted Aloha system at a given time is a Poisson random variable width mean u >= 1. suppose that each packet is independently transmitted in the next slot with probability 1/u. a) Find the probability that the slot is idle. b) Show that the a posteriori probability that there were n packets in the system, given an idle slot, P(n | I) is Poisson with mean u - 1. c) Find the probability that the slot is successful Probability == I dont understand shit about probability