The following figure illustrates the end-to-end transport of a message with and without message segmentation. Consider a message that is 7.5*10 6 bits long that is to be sent from source to destination, suppose each link is 1.5Mbps. Ignore propagation, queuing, and processing delays. (a) (b) Figure 1 End-to-end message transport: (a) without message segmentation (b)with message segmentation a. In Figure 1(a), How long does it take to move the message from the source host to the first packet switch? What is the total time to move the message from source host to destination host? b. Suppose that the message is segmented into 5000 packets, with each packet being 1500bits long. How long does it take to move the first packet from source host to the first switch? At what time will the second packet be fully received at the first switch? c. How long does it take to move the file from source host to destination host when message segmentation is used? d. Compare the result in part (a) and (b).