Help! Operating systems homework question. Use Linux, solve all parts, and provide clear screenshots as well !

2. Changing access rights: chmod u+x Dir1.0 chmod go-w file1 chmod ugo=rw testfile adds execute permission for the owner removes write permission for the group and others sets the permissions for everyone to read and write, but not execute sets the permissions for the owner to read, write, and execute chmod u=rwx newDir a. How to check access rights for files or directories? b. Use the command in (a) to find out the access rights for the file named /etc/passwd. Who is the owner of this file? What is the permission for the group on this file