Our house has three carpeted steps between levels. Is there a Roomba that can clean those steps whilst cleaning the rooms on each of the levels? Or do I need one per step and the levels?

a) I’m not lazy enough to buy a Roomba. If I was, I definitely would be too lazy to nanny it around the house, lifting it up the three steps. b) When I am feeling lazy I hire a cleaner, who uses their own hand vacuum cleaner.