How long does it take for a packet of length 4 KB to travel over three links (connection) with a transmission rate of 4 Mbps? These three links are connected by two routers. The length of each link is 250 km. The packets travel at a propagation speed of 2.5 x 108 m/s over these links. Assume each routers processing delay is 2 ms and each routers queuing delay is 1 ms.