we are, it is the verb to be for more than two people, here reference is made for a feeling of fatigue, they can also be used, but it would not make sense because it indicates that karen and that person are tired, not only karen is tired
Igualmente because If u translate it “mucho gusto” is basically “nice to meet you” and “igualmente” means “you too” or in this case “nice to meet you too” which makes sense.
