please help solve part D and E. Part D is provided in the screen shot

Part E) The average time in the system_____ Minutes (round to two decimal places)

Homework: Homework: Chapter D Save Score: 0.6 of 1 pt 2 of 4 (4 complete) HW Score: 66.19%, 2.65 of 4 pts Problem D.2 Question Help 0 There is only one copying machine in the student lounge of the business school. Students arrive at the rate of 2 - 40 per hour (according to a Poisson distribution). Copying takes an average of 45 seconds, or p = 80 per hour (according to a negative exponential distribution). a) The percentage of time the machine is used = 50 percent (round your response to the nearest whole number). b) The average length of the queue = 0.50 students (round your response two decimal places). c) The average number of students in the system = 1.00 students (round your response to two decimal places). d) The average time spent waiting in the queue = minutes (round your response to two decimal places). Enter your answer in the answer box and then click Check Answer. ? 1 part remaining Clear All Final Check