On average, a customer waits 8 minutes in a queue and the average interarrival time is 4 minutes. What is the average number of customers waiting according to the single-server queue model

Given a normal distribution with µ =50 and σ =4, what is the probability that 5% of the values are less than what x values? between what two x values (symmetrically distributed around the mean) are 95 % of the values? instructions: show all your work as to how you have reached your answer. don’t simply state the results. show graphs where necessary.