Exercise 2. Suppose there are two hosts, S and R. They are communicating over a TCP connection, and R has already received from S all bytes from 1 through 233. Now, Host S then sends three segments to Host R back to back. The segments size are 50, 70, and 90 bytes respectively. In the first segment, the source port number is 212 and the destination port number is 80. Host R sends an acknowledgement whenever it receives a segment from Host S (a) Give the sequence number, source port number, and destination port number for all the three seg- ments