Exercise $5$: $(6+10=16p)$

If each packet carries $1000$ bits of data, the distance between the sender and receiver is

$3000$ km $,$ link speed is $5$ Mbps $,$ and the propagation speed is $2108\frac{m}{s}.$ Assume no data

or control frame is lost or damaged. Ignore transmission time for ACK.

a$)$ How long does it take to send $2$ million bits of data if using Go$-$back$-$N ARQ Protocol if

using $3-$ bit sequence number?

b$)$ Repeat for Selective$-$Reject ARQ Protocol if using $3-$bit sequence number.