1. Describe the concept and operation of cellular communications. Why the cells are shaped as hexagons and what are the fundamental trade offs in these systems? 2. Assume a cellular system with: cluster size 4, 25 channels/cell and 5 cluster repli- cates. What is the total number of channels that can be used simultaneously? For this system, find the cell radius and the channel re-use ratio when the reuse distance is 1km. 3. For the above system, what is the co-channel interference ratio in dB for a path-loss exponent n = 3 and n = 5? What do you observe? 4. For n = 5 and the above values for the reuse distance and the cell radius, what is co-channel interference ratio in dB for the worst-case communication scenario? 5. In the above case, what is the co-channel interference for cell sectoring of 60 & 120? What do you observe