I did the first 3 questions, These are the answers I got.

Question 2 Hosts A and B are communicating over a TCP connection, and Host B has already received from A all bytes up to and including byte 359. Suppose Host A then sends three segments to Host B back- to-back. The first, second and third segments contain 120,1500 and 800 bytes of data respectively. In the first segment, the sequence number is 360, the source port number is 1080, and the destination port number is 8080. Host B sends an acknowledgment whenever it receives a segment from Host A