If N $=2$ links, and R $=2$Mbps$,$ and a packet of $4$Mb needs to be sent and the router forwards bits as soon as they arrive, what would be the end$-$to$-$end delay considering only transmission time?

Question $15$ options:

$0\mathrm{.}5$ sec

$2$ sec

$1$ sec

$1\mathrm{.}5$ sec