select all statements that are false

(Multi select)

1.A low sensor reading in prox.horizontal[2] suggests that there is an obstacle very close directly ahead.

2.A high sensor reading in prox.horizontal[0] suggests that there is an obstacle cery close directly ahead.

3.Selecting the "auto" button in ASEBA,turns on the infra red sensors.

4.Only one sensor will give a value a time;the one with the highest reading.