A total of 32.76 MHz of bandwidth is available for a frequency division duplex (FDD) cellular network, which will be set up to provide duplex cellular service in an urban area of an area of 650 square miles. Each simplex channel has 30 KHz of bandwidth, and each cell has a radius of 2 miles Among the available bandwidth. 1.68 MHz is dedicated to control channels A 7-cell frequency reuse pattern is used for voice channels. In addition, it is required that blocked call requests will be queued, with a probability of queued call. It is assumed that each subscriber makes an average of one call pa hour and each call lasts an average of five minutes during peak hours. a) Determine the number of duplex voice channels per cell in the system. b) Determine the total number of subscribers the system can support. c) What is the probability that a call will have to wait for more than 10 seconds? d) What is the average delay for a call in the system