An automated highway speed monitoring system uses the following algorithm to check if a vehicle is travelling within the permitted range:

1  min_speed ← 30
2  max_speed ← 70
3  measured_speed ← sensor_reading * 3.6
4  IF measured_speed >= min_speed AND measured_speed <= max_speed THEN
5      is_valid ← TRUE
6  ELSE
7      is_valid ← FALSE
8  ENDIF

Select the line number that contains a relational operator.