Please It is very urgent

The TCP sender sends an initial window of 4 segments. Suppose the initial value of the sender-> receiver sequence number is 445 and the first 4 segments each contain 408 bytes. The delay between the sender and receiver is 7 time units, and so the first segment arrives at the receiver at t=8. As shown in the figure below, 2 of the 4 segment(s) are lost between the segment and receiver. a) Give the sequence numbers associated with each of the 4 segments sent by the sender. b) After receiving first and last segment, receiver sends ACKs. Give ACK numbers sent