Q4. {Points: 10} Solve the following problem: Consider the following figure. N users 1 Gbps link Assume that we can support 35 users in the above communication system. Each user can stay active 20% of time. When each user is active, they transmit in 200 Mbps rate. The total capacity of communication link that can support users is 1 Gbps. Calculate the probability of more than 5 users (i.e., 6 or more users) to stay active at the same time? 1 {If you are overwhelmed with the calculation, please write a program in your favorite programming language, just like to way I wrote the program in my lecture slide.} Q5. {Points: 8} Solve the following problem: Host A wants to send a file of size 1 Mb (mega-bits) to Host B. They are connected via 2 routers (3 (serial) communication links between Hosts A and B). The capacities of 3 communication links are 10 Mbps, 20 Mbps, and 1 Mbps. How long does it take for the file to be transmitted from Host A to Host B? Consider no propagation delay, processing delay, and queueing delay. Q6. {Points: 2} Write True/False for the following 2 statements: a. Propagation delay is a function of the capacity (bps) of communication link. b. Transmission delay is a function of the distance between two hosts