6. Delays. A user in Madagascar, connected to the internet via a 100Mb/s (b=bits) connection retrieves a 250KB ( B= bytes) web page from a server in Tokyo, where the page references three images of 500KB each. Assume that the one-way propagation delay is 82ms and that the user's access link is the bandwidth bottleneck for this connection. a. Approximately how long does it take for the page (including images) to appear on the user's screen, assuming non-persistent HTTP using a single connection at a time? (For this part, you should ignore queueing delay and transmission delays at other links in the network) b. How long does it take if the connection uses persistent HTTP (single connection)? c. Suppose that user's access router has a 4MB buffer ( B= byte) on the link from the router to the user. How much delay does this buffer add during periods when the buffer is full? d. Assume a cache rate of 45% on the information received by the user in Madagascar from the Tokyo server. How does this affect your answer in a? Show your work