The student exchanges the black ink cartridge.
text: The ink is uh located on the part just above the first drawer.
text: You can open the white part above the first drawer.
text: You can just pull on it.
text: Uh, above the drawers.
text: Yes.
text: You can take out the black cartridge.
text: Perfect, thank you.
text: You can press the stop button on the HoloLens.