If you wanted to say “you” when speaking to one person informally, you would use ____ as the subject pronoun.
Tu, you
if you wanted to talk about yourself and someone else, you would use ________ as the subject pronoun.
Nosotros, us
4 is A because of ir → vaya; vayan to go → (you, formal) go; (you, pl.) go
5 is C because of ser → sea; sean to be (permanent characteristics or qualities) → (you, formal) be; (you, pl.) be
I got this straight from my notes,
I hope it helps
