The student exchanges an black ink cartridge.
text: Mmmh.
text: It's the first to top, uh... the white color, the door.
text: This one?
text: The first top one, white door on the very top.
text: This?
text: No, the white color on the top of the drawer.
text: This one?
text: Yes, open it.
text: Yep.
text: And change the black cartridge.
text: Good.
text: And close everything.
text: All good.