Answer:
La cama esta a lado de la ventana
Yo: estoy
Nosotros(as):estamos
Tu: estas
Vosotros: estais
El: esta
Ella: esta
Ud. esta
Ellos: Estan
Ellas: estan
Ustedes: estan
Venga a nuestra casa is used for someone who should respect or who is elderly so this would be the right choice.
Ven a nuestra casa would be used to refer to maybe your close friends or people you can be casual with :)
