The student exchanges the ink_cartridge.
text: First, please open the ink cartridge compartment center, that'll be the top door in the printer.
text: To open the door, please use the two slits on the upper sides of the door.
text: Thank you.
text: Moreover please make sure both hands are within view of the camera.
text: Please make sure both your hands are within the camera.
text: Thank you.
text: Please make sure, *unintelligible*.
text: Thank you.
text: Thank you very much.