$4.$ GBN vs SR$.$ Compare Go Back N and Selective Repeat. Assume that the time$-$out values are sufficiently long, such that $8$ consecutive data segments and their corresponding ACKs can be received $($if not lost on the channel$)$ by the receiving host $($Host B$)$ and the sending host $($Host A$),$ respectively. Suppose Host A sends $8$ data segments to Host B$,$ and the $5$th segment $($sent from A$)$ is lost. In the end, all the $8$ data segments have been correctly received by Host B$.$ How many segments has Host A sent in total and how many ACKs has Host B sent in total? What are their sequence numbers? Answer for both protocols.