The answer to #2 is 10.5 seconds. I just need help with #3 (it uses the info from #2) Thank you!!

2. Giving the following information, how long does it take to send a file of 1,280,000 bits from host A to host B over a circuit-switched network? All links are 1.536 Mbps Each link uses TDM with 12 slots/sec 500 msec to establish end-to-end circuit 3. If there are two routers over a package-switched network with the same information in the question 2 and more information listed below, how long does it take to send the same file from router A to router B? the size of a packet is 1,280,000 bits 500 msec to process a packet 500 msec to queue for a slot the length of the link between two routers is 108 m propagation speed in medium is 2x108 m/sec