Host A and $B$ are communicating over a TCP connection, and Host $B$ has already received from A all

bytes up through byte $213.$ Suppose Host A then sends two segments to Host B back$-$to$-$back. The first

and second segments contain $35$ and $50$ bytes of data, respectively. In the first segment, the sequence

number is $214,$ the source port number is $340,$ 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 $($to B$)$ 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 $($to B$)$ before the first segment, in the acknowledgment of the first

arriving segment, what is the acknowledgment number?