WA Car DKT - What is the correct procedure when changing lanes?

Check your blind spot using the external mirrors, indicate and give way to traffic in the other lane.

Touch your brake pedal to warn any drivers behind you, indicate and give way to traffic in the other lane.

Check your mirrors, look over your shoulder to check your blind spot, indicate to change lane for a sufficient distance to warn other drivers of your intention, and give way to traffic in the other lane.

(84/329) What is the correct procedure when changing lanes?