21. (5 points extra credit) You have a choice of locating your mail server behind no firewall (location 1) or 1-3 firewalls (locations 2-4). Which location makes the most sense and justify your answer. Consider a malicious email coming in and doing damage to your network and affecting employees Mike and Kim and affecting your file server. Also think about Mike sending out an email that could employees. Justify your answer else no credit will be awarded. infect other File Server Mike Kim Mail Server