5. Consider a full-duplex transmission link which is 500 km long and has a transmission speed of 100 Mbps in both directions. The propagation delay is 5 msec. per 1000 km. The Go-Back-N protocol is being used to transmit data packets which are 2,000 bits long in one direction. The window size is 100. You may assume that ACKs returned in the opposite direction are small in size so their transmission time can be ignored. You may also ignore processing times and queuing delays for both data packets and ACKs. a) Calculate the utilization of the protocol b) If everything else is the same as above, wha t would be the length of t he link for the utilization to be 0.01 If everything else is the same as above, how long should the data packets be for the utilization to be 0.5 c) d) If everything else is the same as above, what should be the window size for the utilization to be 1