Host A is sending a file to Host B. There are 3 links (therefore 2 switches) between the hosts. The file is segmented into packets of 40 bytes, with a 10 byte header added to each packet. Each link has a transmission rate of 100 kbps and a speed of 1000 km per sec. The switches are 100km away from each other. Host A is 50 km away from the first switch while Host B is 150 km away from the second switch. Data travels from Host A to the first switch, on to the second switch and then to Host B. What is the propagation delay (in seconds) when a packet of data travels between the 2 routers?