The student changes the black ink cartridge in the printer.
text: Black cartridge?
text: Yeah, open up the power on top of the draw.
text: No, on top of the draw with the white cover, the flat one, under it.
text: Open it.
text: That's right.
text: Just take out the black cartridge.
text: Change it for the other one.
text: Okay.
text: Now close the cover