A graph titled Position versus Time, with time in second on the x axis, numbered 0 to 12, and position measured in meters on the y axis, numbered 0 to 12. The graph starts at the origin and is a straight line to point (4 s, 12 m). Then a straight horizontal line from (4 s, 12 m) to (6 s, 12 m). Then a line from (6 s, 12 m) to (12 s, 0 m). Using the graph, describe what is happening between 4 and 6 seconds.

The object is moving away from the origin at a constant velocity.
The object is not moving.
The object is moving toward the origin at a constant velocity.
The object is changing velocity.