Consider a packet of length L which begins at end system A and travels over three links to a destination end system. These three linksare connected by two packet switches. Let di, si, and Ri denote the length, propagation speed, and the transmission rate of link i, for i=1,2,3. The packet switch delays each packet by dproc. a. Assuming no queuing delays, in terms of di, si, and Ri (i=1,2,3), and L, what is the total end to end delay for the packet?b. Suppose now the package is 1,500 bytes, the propagation speed on all three links is 2.5 108 m/s, the transmission rates of all three links are 2Mbos, the packet switch processing Delay is 3 msec., the length of the first link is 5,000 km, the length of the second link is 4,000 km, and the length of the last link is 1,000 km. For these values, what is the end?to?end delay? m/s, the transmission rates of all three links are 2Mbps, the packet switch processing Delay is 3 msec., the length of the first link is 5,000 km, the length of the second link is 4,000 km, and the length of the last link is 1,000 km. For these values, what is the end?to?end delay?c. Suppose you would like to urgently deliver 40 terabytes from Boston to Los Angeles. You have available 100 Mbps dedicate link for data transfer. Would you prefer to transmit the data via this link or instead use FedEx overnight delivery? Explain.