Bailas
Bailan
Estudio
Estudiamos
Estudiaron
Viajo
Viajaron
Ceno
Buscaste
Explique
Llevo
Esperamos
Practicaron
Trabajo
It's describing the chica, which is singular and also feminine, so therefore we must use la.
Hacer means "to do" and is regular in every conjugation except in the "yo" form.
The correct answer is the number 4
