1. Assuming a server takes 20msec to get a request for work, dispatch it, and do the rest of the necessary processing if the data needed are in a cache. If a disk operation is needed, as is the case 1% of the time, an additional 1000msec is required, during which time the thread sleeps. [ 10 points] (a) How many requests/sec can the server handle if it is single threaded? (b) How many requests/sec can the server handle if it is multithreaded