Hosts A and B are communicating over a TCP connection, and Host B has received from A and acknowledged all bytes so far.

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Hosts A and B are communicating over a TCP connection, and Host
B has received from A and acknowledged all bytes so far. Suppose
Host A then sends two segments to Host B back-to-back. The first
and second segments contain 350 and 750 bytes of data,
respectively. In the first segment, the sequence number is 400, the
source port number is 2500, and the destination port number is 80.
Host B sends an acknowledgement whenever it receives a segment from
Host A.
In the second segment sent from Host A to B, what is the
sequence number, source port number, and destination port
number?
If the first segment arrives before the second segment, in the
acknowledgement of this segment, what is the acknowledgement
number, the source port number, and the destination port
number?