You are planning a bank. You plan for six tellers. Tellers take 15 minutes per customer with a standard deviation of 7 minutes. Customers arrive one every three minutes according to an exponential distribution (recall that the standard deviation is equal to the mean). Every customer that arrives eventually gets serviced.On average how many customer would be waiting in line?On average how many would a customer spend in the bank?If a customer arrived, saw the line, and decided not to get in line, that customer h____.A customer who enters the line but decides to leave the line before