please show all your work, detailed solution with comments on it.

(20 pts) Consider a link that has a transmission rate of 1Mbps (i.e., 106bits/sec ) and a round-trip propagation delay of 10msec. Assume that each segment is 125 bytes long and the ACK segments have negligible lengths. Further assume that the link is reliable that does not lose segments. What should be the minimum window size N (in segments) in order to achieve a sender (channel) utilization of at least 0.8 for Go-Back-N