Given a cellular system with 416 radio channels available for handling traffic. Assume that 21 of these channels are designated as control channels. Let the average channel holding time of a call be 3 minutes, the blocking probability during busy hours be 2% and the frequency reuse factor be 9. (a) Determine the number of calls per hour. (b) Determine the signal-to-co-channel interference ratio, S/I in dB. cell per