A snapshot of the traffic pattern in a cell with 10 users of a wireless system is given as follows: a) Assuming the call setup/connection and call disconnection time to be zero, what is the average duration of a call? b) What is the minimum number of channels required to support this sequence of calls? c) Show the allocation of channels to different users for part (b) of the Problem. d) Given the number of channels obtained in part (b), for what fraction of time are the channels utilized