Use a command which shows only the permissions, and the name of files/directories under /etc directory. The list must be sorted in a descending
order based on the name of the files.

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.