SBL Bank has a single automated teller machine (ATM) located in a shopping center. Data were collected from during a period of peak usage on Saturday afternoon and it was found that the average time between customers arrivals is 2.1minutes with a standard deviation of 0.8minute. It also was found it takes an average of 1.9minutes (with a standard deviation of 2minutes) for a customer to complete a transaction. (a) Calculate expected customer arrival rate & service rate per server? (b) Calculate the expected server utilization? C Approximately how long will customers need to wait in line during the peak usage period