P6. This elementary problem begins to explore propagation delay and transmis- sion delay, two central concepts in data networking. Consider two hosts, A and B, connected by a single link of rate Rbps. Suppose that the two hosts are separated by m meters, and suppose the propagation speed along the link is s meters/sec. Host A is to send a packet of size L bits to Host B. a. Express the propagation delay, dprop, in terms of m and s. b. Determine the transmission time of the packet, dans, in terms of Land R. c. Ignoring processing and queuing delays, obtain an expression for the end- to-end delay d. Suppose Host A begins to transmit the packet at time t = 0. At time t = decans, where is the last bit of the packet? e. Suppose dprop is greater than dyans. At time t = dyans, where is the first bit of the packet? f. Suppose dprop is less than drans. At time t = durans, where is the first bit of the packet? g. Suppose s = 2.5. 108, L = 120 bits, and R = 56 kbps. Find the distance m so that dprop equals derans