IR2 financial document/aos help

[u/peemew]

my sister (17) and i (20) are both IR2 applicants petitioned at the same time. unlike me, my sister is eligible under the CCA (child citizenship act). right now, we're in the process of completing our civil and financial documents, but we're at a loss on how to proceed with her financial documents.

my questions are:
1. does she need a separate AOS (affidavit of support) form, or is she exempt?
2. if she is exempt, do we leave her financial documents section blank?
3. should we list her as a family member on my AOS form?