Problem
Simulate the operation of a bank. Customers enter the bank, and there are one or more tellers. If a teller is free, that teller serves the customer. Otherwise the customer enters the queue and waits until a teller is free. Your program should accept the following inputs:
• The arrival rate for the customers
• The average processing time
• The number of tellers Use your program to determine how many tellers are required for a given arrival rate and average processing time.