Given the following output from the ls command, how many files are linked with file1? drwxr-xr-x 3 root root 4096 Apr 8 07:12 Desktop -rw-r--r-- 3 root root 282 Apr 29 22:06 file1 -rw-r--r-- 1 root...

Given the following output from the ls command, how many files are linked with file1?
drwxr-xr-x     3 root      root        4096 Apr 8 07:12 Desktop
-rw-r--r--       3 root     root        282 Apr 29 22:06 file1
-rw-r--r--      1 root      root       282 Apr 29 22:06 file2
-rw-r--r--      4 root      root       282 Apr 29 22:06 file3
-rw-r--r--      2 root      root      282 Apr 29 22:06 file4
-rw-r--r--      1 root      root        282 Apr 29 22:06 file5
-rw-r--r--      1 user1     sys       282 Apr 29 22:06 file6
a. one
b. two
c. three
d. four