Louisa would NOT be able to sue an occupier under the Occupiers Liability Act in which of the following situations?

1. (1)While driving over to Ken's home, Louisa spills hot coffee down the front of her shirt and stops at a gas station washroom to clean herself up.
2. (2)Louisa, a door-to-door vacuum cleaner salesperson, is given ten minutes to demonstrate her product in Ken's home, during which time a chandelier falls on her.
3. (3)Louisa goes to Barbie's salon for a haircut and is attacked by Barbie's guard dog who has escaped from the back room.
4. (4)Louisa, though not invited, drops in on her friend Ken and walks around to the rear entrance which is Ken's usual entrance. Louisa slips on a skateboard which was left by the back stairs and breaks her arm.