i$.($Pipelined Protocols.$)$ Consider the Go$-$Back$-$N $($GBN$)$ protocol with a sender window size of $8.$ Suppose that the sender has sent packets pkt$0,$ pkt$1,...,$ pkt$7$ in the pipeline, and pkt$5$ is lost during transmission $($i$.$e$.,$ pkt$6$ fails to arrive at the receiver$).$ Assume that the medium does not reorder messages. Please list all the ACKs that the sender will receive for the pipelined $8$ packets from the receiver. If the Selective Repeat $($SR$)$ protocol is running, what will be your answer again?

ii$.($TCP Timeout Interval.$)$ Suppose that the three measured SampleRTT values are $106$ ms$,120$ ms$,140$ ms$.$ Compute the Estimated RTT after each of these SampleRTT values is obtained, using a value of $\backslash$alpha $=0\mathrm{.}125$ and assuming that the value of EstimatedRTT was $100$ ms just before the first of these three samples were obtained. Compute also the DevRTT after each sample is obtained, assuming a value of $\backslash$beta $=0\mathrm{.}25$ and assuming the value of DevRTT was $5$ ms just before the first of these three samples was obtained. Last, compute the TCP TimeoutInterval after each of these samples is obtained. What is the value of TimeoutInterval after the three measured SampleRTT? Please specify the computing process of each step.