The following message is displayed when you attempt to log in with an incorrect username or an incorrect password: login incorrect this message does not indicate whether your username, your password, or both are invalid. why does it not tell you this information? 2. give three examples of poor password choices. what is wrong with each? include one that is too short. give the error message the system displays. 3. is fido an acceptable password? give several reasons why or why not. 4. what would you do if you could not log in? 5. try to change your password to dog. what happens? now change it to a more secure password. what makes that password relatively secure? 6. how would you display a list of utilities that compress files? 7. how would you repeat the second preceding command line, edit it, and then execute it? 8. briefly, what information does the –– option display for the tar utility? how would you display this information one screen at a time?