A singleserver service facility had the capacity to serve 38 customers per hour on average. The average customer demand was 31 customers per hour. Determine the average waiting time in the line in minutes. {j} A. 5.09 -:Ijj:- B. 3.88 {j} c. 3.04 {j} D. 6.99 A customer service agent in a local bank has a track record of completing service every 8 minutes on average, according to an exponential distribution. Customers arrive seeking service at the rate of six per hour, according to a Poisson distribution. What percentage of time is the customer service representative busy serving customers? 60% 75% 85% 80% 9.0!\