Definitely sweeping/vacuuming. Mopping may be a little dangerous (I'm just thinking if you slipped or lost your footing on a wet floor, with the additional weight of a baby out the front, your centre of gravity is probably altered a little bit and you may be more inclined to fall?). Just a thought anyway......

Probably some basic food prep, chopping/peeling etc, but not the cooking side of it as Katanya said.

You could probably dust things that are at your level and squat for things that are beneath you perhaps?