A link layer protocol operates on a half$-$duplex channel $($one direction at a time$).$ In each direction, the physical layer bit rate is $1$ Mbit$/$s$,$ the probability of bit error is $10-6$ and the propagation delay is $60$ ms$.$ Because of the long delay, the sender sends $8$ data frames and then stops and waits for a response from the receiver. The receiver sends one response frame, containing its response to the group of $8$ data frames, and then waits for more data frames. A data frame can carry up to $8000$ data bytes, and the header and trailer add another $88$ bits. a$)$ Design some of the details of this protocol. Exactly what information should be included in the response from the receiver? Exactly what should the sender do when it receives this response? What range of sequence numbers is needed to allow this protocol to operate efficiently? $($You may wish to consider the probability of success in part b$.)$