Suppose the path from User M to user N has a router $($R$)$ in between like: M$-----$R$------$N$.$

The propagation delay for each link is considered as $600$sec$.$

a$)$ How much time is required to send a single packet $600-$byte from M to N$?$

b$)$ Calculate the time to send two $300$ byte packets one after another in continuation from

M to N$.$

Also show the timeline showing the start and end of packet from M$,$ R & N for above mentioned

both questions. Assume the network has a bandwidth of $2$ bytes$/$sec$.$