President Francisco Madero...
Answer:
Tú
Explanation:
Tú is the only one of those four that is informal.
Tú is informal "you", usted(es) is "formal you (all)".
Ellos is "they".
Answer:
esta escribiendo
Explanation:
esta = is escribiendo = writing
Comprar is the verb. In the yo form it’s compro tu form is: Compras
