Assume that the timeout values for TCP protocol is sufficiently long such that four

consecutive data segments and their corresponding ACKs can be received if not lost in

the channel by the receiving host B and the sending host A respectively.

Suppose Host A sends four data segments to Host B$,$ and the second segment is lost.

In the end, all four 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.