Problem 3 In an experiment to transmit 3 packets (there are two types of packets: data and video), the PMF of N, the number of video packets is 3 4 PN(n) 0.2 0.3 0.4 (a) Complete the above table. (b) Find CDF of N. (c) Find E[N] and Var[N]. (d) It takes 9 seconds to transmit a video packet, while it takes 5 seconds to transmit a data packet. Let T be the time in seconds to transmit the total three packets. Find the PMF of T and E[T].

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