1. Suppose two computers transferred a series of two messages using Stop and Wait ARQ. Suppose the first message is initially received with an error, and the second message initially not received at all. Draw the pattern of messages, ACKs, etc. that would flow between the two to ensure successful transfer of both messages.

2. What is the transmission rate of information bits if you use EBCDIC (8 bits plus 1 parity bit), a 1000 character frame, 28,800 bps modem transmission speed, 20 control characters per frame, an error rate of 1 percent, and a 30-milisecond turnaround time? What is the TRIB if you add a half-second delay to the turnaround time.