Assume that you have a printer that can print an average file in a minute and 20 seconds. Every two minutes a user sends another file to the printer. How long does it take before a user can get their output? To speed things up you can buy another printer that is exactly the same as the one you have. How long will it take for a user to get their files printed if you had two identical printers? Another solution is to replace the existing printer with one that can print a file in an average of 35 seconds. How long does it take for a user to get their output with the faster printer? If the above printer breaks down for 3 minutes, how many files can you expect to be generated while the printer is broken? What is the probability that no files were generated while the printer was broken