Final answer:
The fifth step in passing on a 2-lane road usually involves making sure you have sufficiently passed the vehicle you're overtaking and can see its headlights in your rearview mirror.
Step-by-step explanation:
The fifth step when passing on a 2-lane road isn't specifically mentioned in the provided references.
However, based on general driving guidance, once you have checked for safety, signaled, and begun to pass, the fifth step usually involves ensuring that you have adequately passed the vehicle you are overtaking.
This means you need to make sure that you can see the passed vehicle's headlights in your rearview mirror, ensuring you have enough space to safely return to your lane without cutting them off.