Consider the network containing four computers in each department and two servers in Figure 2. To external- internet 100 Mbps (fiber) Electrical Engineering 1 Gbps 10 Mbps Web server 100 Mbps (fiber) Computer Science Mail server 100 Mbps (fiber) Computer Engineering Figure 2: A network containing four computers in each department and two servers a. Suppose that all links are 10 Mbps for the end systems. What is the maximum total aggregate throughput that can be achieved among the 14 end systems in this network? Why? b. Suppose the three departmental switches are replaced by hubs. All links are 10 Mbps for the end systems. What is the maximum total aggregate throughput that can be achieved among the 14 end system in this network? Why?