A usted because its formal.
Location, Origin, & Temporary Conditions.
(correct me if wrong)
Answer:tú
Explanation:
Because it has you in it and is talking about you(this might be right )
hi !!
Terminamos el examen ==> acabamos de terminar el examen.
acabar <em>present </em>
acabo
acabas
acaba
acabamos
acabáis
acaban
hope this helps :)
Looks correct to me love :)