Question 4 (Mandatory) (20 points) Q4.1 Linux file permission: Is "documents" a file or a directory? What does the file permission for the following entry mean? (6pts) drw-r-c- 1 jdoe jdoe 0 Mar 11 10:54 documents Q4.2 Suppose you are a Linux systems administrator, and one of your user Jane Doe (userid: jdoe) has a resume file which cannot be displayed by the web server: jdoe/public_html> Is -al resume.html -rw-r-w-1jdoejdoeMar1110:54resume.html In order to fix this problem, you'll have to make the file "readable," for the rest of the world, e.g., the file permission should look like this: -rw-r-r-- 1 jdoe jdoe 0 Mar 11 10:54 resume.html What Linux command should you issue to make this change happen (please include the Linux command, command switches/options, and command arguments)? (6pts) Q4.3 Under Linux command prompt, when you type "umask," the result shows "0021". Please explain what "0021" means. (8 pts)