Questions 1-4:
On a narrow street, I'm going to occupy the entire traffic lane to prevent any traffic behind me from being tempted to pass with inches to spare, but if there's a clear spot where passing can be done safely I'll move over to the right. At most stop lights, I move left and stop right next to the centerline so that if a driver behind me wants to make a right turn on red, they're free to do so.

5-6: I'm going to do my best to ride at the prevailing speed of traffic.
7: The driver of the car is backing into a parallel parking spot, I'm going to politely stop and wait for him to do so. If there's no traffic at all coming on the other side of the street, I might cross the centerline and just go around the parking car.
8: Vehicles must yield to pedestrians and I am operating a vehicle, so I come to a stop behind the car which is stopped for the ped.
9: If a tree falls in the forest and nobody is around to hear it, does it make a noise?