It means "Where do you go on the weekends?"
En todo el mundo cambia la forma en la que se come, depende del país el almuerzo, desayuno y cena varían conforme a su costumbre de vida
The answer is estaba; fui Is preterite tense and Is not used for conditions/states,era is imperfect for ser but like fui isn’t used for conditions and estuvo is not in the yo form conjugation leaving estaba as your answer
