What is the correct ergonomic check for adjusting the driving seat backrest and steering wheel distance?

1. Extending both arms completely straight with shoulder blades lifted off the seat
2. Bending elbows at a 90-degree angle with the chest within 10 cm of the steering wheel airbag
3. Holding the lower spokes of the steering wheel with arms resting on the thighs
4. Resting the wrists comfortably on top of the steering wheel rim with shoulders flat against the backrest