Final answer:
The given particle has a turning point midway through its motion at a displacement of 4.0 m where it changes direction and starts moving back towards the origin.
Step-by-step explanation:
The given particle has a turning point midway through its motion. This means that the particle changes direction and starts moving back towards the origin at some point. The turning point occurs when the particle is at a displacement of 4.0 m. At this point, the particle will change direction and start moving back towards the origin.