Consider an institutional network connected to the Internet via an access link whose capacity is 10 Mbps. The institution LAN capacity is 100 Mbps. Suppose the average object size is 800,000 bits and the average request rate from the institution's browsers to the origin servers is 12 requests per second. Also, suppose that the amount of time it takes from when the router on the Internet side of the access link forwards an HTTP request until it receives the response is 2 seconds on average. Model the total average response time as the sum of the average access delay (that is, the delay from the Internet router to the institution router) and the average Internet delay. For the average access delay, use (lju)( 1-p), where the traffic intensity ? = ???, lju is the average time required to send an object over the access link and ? is the arrival rate of objects to the access link. 1. (a) Find the total average response time (b) Now suppose a cache is installed in the institutional LAN, and that the miss ratio is 0.4, find the total response time