Exercise 2. Suppose there are two hosts, S and R. They are communicating over a TCP connection, and R has already received from S al 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. (b) If the segments arrive at R in given order 1, 2, 3, what is the acknowledgement number, the source port number, and the destination port number in the acknowledgment of the second arriving segment? (c) If the segments arrive at R in given order 1, 3, 2, what is the acknowledgement number, the source port number, and the destination port number in the acknowledgment of the second arriving segment? (d) Lets suppose the three segments sent by S arrive in order at R. The first segments acknowledgment there is no additional packet loss. For each segment in your figure, provide the sequence number and the number of bytes of data; for each acknowledgement that you add, provide the acknowledgment number