QUESTION 2 (25 Marks) a. Analyze the total de lay (latency) for a frame of size 5 million bits that is being sent on a link with 10 routers. Each router has a queuing time of 2 us and a processing time of 1 us. Given the length of the link is 2000 km. The speed of the light inside the link is 2 x 108 m/s. The link has a bandwidth of 5 Mbps. Based on the analysis, determine which component of the total delay is domina nt and which is negligible. (CO3: PO3 - 10 Marks) b. Construct the graph of the NRZ-I scheme based on the data streams, assuming that the last signal level has been positive. Evaluate the bandwidth for this scheme using the average number of changes in the signal level. i. ii. 00000000 11111111 01010101 00110011 iii. iv. (CO3: P03 - 10 Marks) C. Develop the result of scrambling the sequence 11100000000000 using B8ZS scrambling technique. Assume that the last non-zero signal level has been positive. (CO3: P03 - 5 Marks)