You are setting up a system to detect if fluid is inside a carton so the robot can pick the empty cartons off the line. Which of the following would work for this task? O Inductive proximity switch O Capacitive proximity switch Photoelectric proximity switch O Hall effect sensors Question 4 4 pts photoelectric sensors separate the transmitter and receiver into different units, placed opposite each other. O Through-beam Retroreflective O Diffuse O Light-level detection