Suppose A and B create a TCP connection with ISNA=20,000 and ISNB=5,000. A sends three 1000-byte packets (Data1, Data2 and Data3 below), and B ACKs each. Then B sends a 1000-byte packet DataB to A and terminates the connection with a FIN. In the table below, fill in the SEQ and ACK fields for each packet shown.

A sends	B sends
SYN, ISNA=20,000
	SYN, ISNB=5,000, ACK=______
ACK, SEQ=______, ACK=______
Data1, SEQ=______, ACK=______
	ACK, SEQ=______, ACK=______
Data2, SEQ=______, ACK=______
	ACK, SEQ=______, ACK=______
Data3, SEQ=______, ACK=______
	ACK, SEQ=______, ACK=______
	DataB, SEQ=______, ACK=______
ACK, SEQ=_____, ACK=______
	FIN, SEQ=______, ACK=______