The Solomon Law Firm produces many legal documents that must be typed for clients and the firm. Requests average 8 pages of documents per hour, and they arrive according to a Poisson distribution. The secretary can type 10 pages per hour on average according to an exponential distribution. a) What is the average capacity utilization of the secretary? b) What is the probability that more than 4 pages are waiting or being typed? c) What is the average number of pages waiting to be typed?