How long does a packet of length 2KB take to propagate over three links, of rates R1 = 500 Kbps, R2 = 1 Mbps, R3 = 1.5 Mbps, and of distances d1 = 1 mile, d2 = 1.5 mile, and d3 = 2 mile? The propagation speed on all links are 2x108 m/s. These three links are connected by two routers. Each router has a processing delay of 1 msec and queuing delay of 2 msec