What the four type of delays, which contribute to the overal…

What the four type of delays, which contribute to the overall latency experienced when data travels across a network. Based on the following facts, calculate each of them. If any type of delay cannot be determined, clearly state so in your answer and give the reason why. Host A sends 2000 Bytes in one packet to Host B. There is three routers between the two hosts. The distance between any host/router and the router/host is 20 Km, and the rate on all links are 100 Mbps. Usually, the propagation speed depends on the physical medium of the link, which is equal to, or a little less than, the speed of light. In here, it is 2*108 meters/sec. Assume an ideal router that does not cost any time to move bits from the incoming port to the outgoing port.