pls solve for part d

There is only one copying machine in the student lounge of the business school. Students arrive at the rate of =50 per hour (according to a Poisson distribution). Copying takes an average of 45 seconds, or =80 per hour (according to a nogative exponential distribution). a) The percentage of time the machine is used = percent (round your response to the nearest whole number). b) The average length of the queue = students (round your rosponso to two docimal places). c) The average number of students in the system =1.67 students (round your rosponso to two decimal places). d) The average time spent waiting in the queue = minutes (round your rosponse to fwo decimal ploces)