Computer A uses HDLC with Go$-$back$-$N ARQ to send $3$ Mbytes file to computer $B.$ Given each frame

carries $40$Kbytes data. How long does it take to send the whole file $($the total time taken from A sending

the first bit of the file until A receiving the last acknowledgment$)?$ Given that the transmission rate of

the link is $100Mbps$ and the propagation time between A and $B$ is $10ms.$ Assume the maximum

allowable window size is used, no data or control frame is lost or damaged. Ignore the overhead due

to header and trailer.