step by step process so i can learn how to do it

Students arrive at the Administrative Bervices Oifoe at an average of one every 14 minutes, and their requesis take., on average, 8 minules to be procested. The sarvice counter is staffed by only one ckerk, Judy Gumshoes, who works elght hours per day. Astume Poisson artivals and exponential sanice times. a. What is the utilzation rate? b. The average number of students in line. c. The average time of waining in line