Consider the figure to the right, with each link showing its transmission rate and propagation delay. There are three separate LANs, each having its own cache. All packets for this problem are 2500 bits long. a. What is the time needed to transfer a packet from the server directly to Host B? You can assume that there is no other traffic in the network and any other delay not indicated is negligible. b. Assume that the caches are all off. What is the maximum rate that Host C can receive data from the web server if there is no other traffic in the network? c. Now assume the caches are on, but Host B is the only active client. If the hit rate is 45%, and we presume that any data held by a cache is fresh data, what will be the maximum rate that the client can receive data for this scenario? d. For this scenario, the caches are on, each with a 35% hit rate, and all three hosts are active. Again presume that any data held by a cache is fresh data. What will be the maximum rate that Host A can receive data