1. (30 marks) Consider two hosts, A and B, separated by three 1.6 Mbps links (two switches) as shown in Figure 1. Host A segments a file F of size 1.8 Kb into three equal-sized segments and adds 5 bytes of header to each segment to form three packets. Suppose that the length of each link is 100 km, and suppose that the propagation speed along links is 2.5 x 100 kilometers per second. Host A is to send file F to Host B. Ignoring processing and queuing delays, obtain the end-to-end delay for the transmitted file F. Switch Switch Host A Host B Figure 1: Diagram for Problem 1