$($d$)$ Assume that there is a satellite network system which is set with the following crucial parameters: Prames containing $3060$ data bits and $40-$bit header. signal propagation period from earth to satellite is $270ms,$ ACK frames are yet to occur on this network $($i$.$e$.,$ they are not yet transmitted by receiver$),$ size of NAK frames is $40$ bits, error probability rate for data frames is $1\%$ and the error rate for NAK frames is negligible. Consider that hundred frames are sent initially and there is a $50Kbps$ satellite channel available. Aso assume that the Timeout$-$Timers of every sent frames are still active. Ignore the case of ACK timer $($they are not implemented in this system$).$

i$.$ Determine the flow control policy which needs to be implemented on this system. Explain. $[2]$

ii$.$ Compute the percentage of bandwidth that is masted on network overhead $($headers and retransmissions$)$ for the implemented protocol for this satellite network. $[5]$