What happens next?

A tire for a bicycle spins, and a man catches it. We see a question written on paper, then a man in a bike shop as he talks. he

Select from:
1). hooks the tire to the rear tire of the bike.;
2). presses buttons on a key that spins.;
3). demonstrates how to remove the rubber of a tire from the frame and replace it.;
4). takes a break from talking, then we see him hovering with a tool.;
3).