responsible

Dear scholars, As-salamu `alaykum. I heard in a discussion that four will be punished for the woman that does not wear Hijab (that is, her husband, her father, her brothers, and her sons). Can you tell me if this is correct? Jazakum Allah khayran.

If a person committed haram acts before the age of puberty, would he still be accountable for them? Does it make a difference what the haram acts were?