P$27.$ Host A and B are communicating over a TCP connection following RFC $5681.$ Host B has already received from A all bytes up through byte $96.$ Suppose Host A then sends two segments to Host B back$-$to$-$back. The first and second segments contain $40$ and $80$ bytes of data, respectively. In the first segment, the sequence number is $97,$ the source port number is $302,$ and the destination port number is $80.$ Host B sends an acknowledgment whenever it receives a segment from Host A a$.$ In the second segment sent from Host A to B$,$ what are the sequence number, source port number, and destination port number? b$.$ If the first segment arrives before the second segment, in the acknowledgment of the first arriving segment, what is the acknowledgment number, the source port number, and the destination port number? c$.$ If the second segment arrives before the first segment, in the acknowledgment of the first arriving segment, what is the acknowledgment number? d$.$ Suppose the two segments sent by A arrive in order at B$..$ The first acknowledgment arrives after the first timeout interval. What is the sequence number of the next segment that A will transmit?