Read the following passage and answer the questions.
Viet is a student and he lives in a bed-sit in a suburb of Hanoi. It’s a part of an old house. He has one room and a kitchen and share a bathroom with three other people. In his room, there is a bed on the left hand side. There is an armchair beside the bed. The desk is opposite the bed and there is a closet on the right side of the room. Above the desk, there is a bookshelf and above the bed there is a clock. He has a TV and a hi-fi, too. In the kitchen, there is a cooker on the right hand side. The sink is near the cooker. There’s a small table and two chairs in the center. The kitchen is small, but it’s ok. Viet like his room very much.
How many people share the bathroom with Viet?