(c) A 6,400-byte message is to be transmitted from source to destination over a point-to-point link. The link is 100-km long and signals propagate at a speed of 2x103 m/s in the link. The channel operates at a rate of 18 Mbps. The network limits frames to a maximum size of 180 bytes, and each frame has a 20-byte header. Ignore the processing delay and the queuing delay at the nodes. (i) Consider the case where Stop-and-Wait Automatic Repeat reQuest (ARQ) is used for error control. Assume that the transmission line has a bit error rate (BER) of 104, Acknowledgement (ACK) is always error free, and ACK time is negligible. How long does it take to get the entire message from the source to the destination? (ii) Consider the case where there is no transmission error in the channel and sliding window flow control is used to pace between the source and the destination. Assume that ACK frame is 36-byte long and ACK frame is sent by the receiver for every data frame that is received. For a maximum window size of 8, what is the maximum throughput of the data payload in bps? (11 Marks)