Question-1 15 marks] A cellular system using a cluster size of 7 cells, each with 3 km2 area. It is operated with 660 channels, 30 of which are designated as setup channels so that there are about 90 voice channels available per cell. If there is a potential user density of 9000 users/Km in the system, and each user makes an average of one call per hour and each call lasts 1 minute during peak hours (10:00 AM - 1:00 PM). Determine the probability that a user will experience a delay greater than 20 seconds if all calls are queued. Question-1 15 marks] A cellular system using a cluster size of 7 cells, each with 3 km2 area. It is operated with 660 channels, 30 of which are designated as setup channels so that there are about 90 voice channels available per cell. If there is a potential user density of 9000 users/Km in the system, and each user makes an average of one call per hour and each call lasts 1 minute during peak hours (10:00 AM - 1:00 PM). Determine the probability that a user will experience a delay greater than 20 seconds if all calls are queued