Consider a packet of length 1,500 bytes that begins at end system A and travels over three links to a destination end system B. These three links are connected by two packet switches. The propagation speed on all three links is 2.5 × 108 m/s, the capacity of the three links is 10 Mbps, 5 Mbps and 20 Mbps, respectively, the packet switch processing delay is 1 msec, and the lengths of the three links are 5,000 km, 2,500 km, and 1,000 km, respectively. Suppose there is no queuing delay. What is the end-to-end delay? Describe the components in the end-to-end delay and show intermediate steps.