1. Compare GBN, SR, and TCP (no delayed ACK). Assume that the timeout values for all three protocols are sufficiently long such that 4 consecutive data segments and their corresponding ACKs can be received (if not lost in the channel) by the receiving host (Host B) and the sending host (Host A) respectively. Suppose Host A sends 4 data segments to Host B, and the 3rd segment (sent from A) is lost. In the end, all 4 data segments have been correctly received by Host B. Suppose each data segment has only byte data and 4 data segments have sequence numbers 1, 2, 3, 4. 1) For all three protocols GBN, SR and TCP, how many segments has Host A sent in total and how many ACKs has Host B sent in total