Consider sending a file of F bytes over a path of Q links. Each link transmits at R bps. The network is lightly loaded so that there are no queuing delays at any link. The propagation delay on each link is Tp seconds on average. Suppose the network is a packet-switched datagram network and a connectionless service is used. Now suppose the size of each packet is P including 2h bits of header. How many packets are needed to send the file? How long does it take to send the file to its destination?