How do electromagnets move a maglev train in regards to levitation and then propulsion? (select two)

Question

(2 points)
Magnets in the sides of the tracks constantly repel and attract magnets in the sides of the train, propelling
the train forward.
Magnets in the track attract magnets in the train's undercarriage, levitating the train.
Magnets in the sides of the track constantly switch on and off, propelling the train forward.
Magnets in the track repel magnets in the train's undercarriage, levitating the train.

Answer 1

Magnets in the track attract magnets in the train's undercarriage, levitating the train.
Magnets in the sides of the track constantly switch on and off, propelling the train forward.