The Solomon, Smith, and Samson law firm produces many legal documents that must be word processed for clients and the firm. Requests average 4 pages of documents per hour, and they arrive according to a Poisson distribution. The secretary can word process 5 pages per hour on average according to an exponential distribution. a. The average utilization rate of the secretary is % utilization. (Enter your response as a percentage rounded to the nearest whole number.) b. The probability that more than four pages are waiting or being word processed is . (Enter your response rounded to three decimalplaces.) c. The average number of pages waiting to be word processed is _ pages. (Enter your response rounded to two decimal places.)