1) El martes no va a llover tampoco
2) Alguien puede ayudarte?
I'm spanish native.
Glad to help you.
Answer:
Tú is not formal, while usted is. You use tú with friends and family and such, and usted with, for example, your teacher or the president.
Answer is “Les gustan” because it’s 2 people Sara y Ana
C, it would be A, but the question said which was built first.