Figure 1 shows a general architecture of a mobile cellular network. Identify and describe the key network elements for radio access part of the mobile network that uses this kind of architecture. a) There are a few conceptual 5G network architectures discussed in class towards achieving low latency service optimization. Explain how these conceptual architectures are achievable in 5G network. b) A cellular network operator decides to deploy a system with 128 cells with a cell radius of 0.8km. The deployment uses cluster of size 7 and was allocated with total frequency bandwidth that supports 336 traffic channels. i. How many channels can be assigned for each cell? ii. What is the total area covered? iii. What is the number of simultaneous user calls that can be handled by the deployment