Answer:
Leave the consonant and add an -es.
Explanation:
El chico está usando su bicicleta.
Mi abuela está haciendo una sopa de pollo.
Hoy es el cumpleaños de Carlos.
Answer:
estás
Explanation:
From this point of view, Marco is asking a person directly, so he would use estas, instead of any other form of conjugation.
Secondly, eres is used to describe a permanent trait about a person; the way that Luisa is feeling, is only temporary, therefore you should not use Eres.
