A user has called you to complain that he does not have access to a file. While on the phone, you add the user to the appropriate group that has permission to access the file. You ask the user to try to access the file again, but he still cannot. What should you do$?$ Tell the user to log off and log on again. Delete the user account and re$-$create it$.$ Add the user to the permission list for the file. Shut down the server and restart it$.$