1.on your kali linux system, find the location (i. e., absolute path) of these two files: "passwd" and "shadow". show the commands that you use to find them. what are the differences between these two files? 2.how can you find out the hostnames and ip addresses for dns root name servers? include the screenshots that show the command(s), and the hostnames and ip addresses of the root name servers. how many root name servers are there? what is their geographical distribution? (how many of them are in us, in europe, .how many mail servers does have? what are their hostnames and ip addresses? show these using commands in kali linux.