5.1) a) Please fill the blank below so that "ls" command, with proper options, will display the files under the root directory, /, without the "group" and "owner" information. The last two lines of the output should be the same as the ones provided below. (8 points) (hint you need to use "man is to find the proper options for Is commander) $ ls 1 / I tail -2 drwxr-xr-x 10 root root 4096 2014-08-14 us drwxr-xr-x 14 root root 4096 2015-01-08 var $ ls / I tail -2 drwxr x-x 10 4096 2014-08-14 usx drwxr x-x 14 4096 2015-01-08 var Mak