Design class structure

I am not sure, if I am here right! How you would design the class structure for the question below. Thanks

Design class structure for a building, floors and space. The space can be an apartment, a store or an
office. Include any properties, fields and methods you think would be interesting to have.

Just looking at a building:
* A building contains floors
* A building has a name
* A building has an address
* A building has a management office (probably)
* A building can lock or unlock its doors
* A building can have its fire alarm go off
See how this works?

Yeah I see! But I have to only write or it expect a UML Diagramm or so?? *Design

I dunno. Ask whoever posed you the problem how they want the answer.