No
No
No
No
Only when under sail alone and is crossing the path of a power boat.
only when under sail alone and when crossing the path of the power boat
When a sail boat overtakes a power boat the power boat is the stand on vessel.
The boat being overtaken is always stand-on, regardless of propulsion type. Rule 13.
No !
power boat
power boat
only when under sail alone and is crossing path of powerboat