Suppose two hosts, A and B, are connected by two routers and…

Suppose two hosts, A and B, are connected by two routers and three links, of rates R1 = 1 Mbps, R2 = 5 Mbps, and R3 = 4 Mbps. Assume host A sends a large file to Host B, and there are no other traffics in the network. What is the end-to-end throughput for the file transfer?