The student exchanges an black ink cartridge.
text: Then how do I do that?
text: So the that's the black black printer cartridge and you can open the shelf, it's the very top part on the front.
text: It's the, not that one
text: Oh sorry.
text: It's on the front above the shelf that you just opened.
text: So, above it, yeah, see.
text: Pull it down.
text: The black cartridge just on the left-hand side.