Answer:
because its a question and not a stetement
Explanation:
yes you could put ella before va but that would make it a statement. So in order for the sentance to be a question they put ella after estudiar.
Yo- é
tú- aste
él/ella/ud.- ó
nosotros- amos
vosotros- asteis
ellos/ellas/uds.- aron
