On average, 100 customers arrive per hour at the Gotham City Bank. The average service time for each customer is 1 minute. Service times and interarrival times are exponentially distributed. The...

On average, 100 customers arrive per hour at the Gotham City Bank. The average service time for each customer is 1 minute. Service times and interarrival times are exponentially distributed. The manager wants to ensure that no more than 1% of all customers will have to wait in line for more than 5 minutes. If the bank follows the policy of having all customers join a single line, how many tellers must the bank hire?