Customers arrive at a bank every 10 minutes exponentially distributed. The bank has only one teller who can serve an average of 15 customers per hour. Model this as a single server and use Excel to simulate the model until the nth customer arrives and get service. Where n is a number consists of the last three digits of your student number and if that number is less than 100, then take the first three digit numbers (i.e. if your student number is 123456, then n = 456, but if it is 123016, then n = 123). Then 1- Find W, W, La and L on the same Excel sheet. 2- Run the simulation 10 times, each time find the estimate of W and then find the average value of W, show all these estimates on the same Excel sheet.