$.$ Suppose host S sends a packet to host D over a packet$-$switched network. Suppose the network topology and the states of the routers do not change. Clearly explain why each of the statements below is true or false $(1$ pt for answer, $2$ points for explanation each$).$ i$.$ If datagram routing is used, we can say that correct forwarding may have occurred even if the same packet traverses the same network link $($and router pair$)$ in opposite directions. ii$.$ If virtual circuits are used, we can say that correct forwarding may have occurred even if the same packet traverses the same network link $($and router pair$)$ in opposite directions