17 y/o with a child

My daughter is 17 yrs old and had a son in June. She also has a part time job. I provide all housing/food/transportation/etc for my daughter. She buys anything she wants (if she doesn't like what I buy), clothes and toiletries for herself and buys anything related to her newborn (clothes/diapers/formula/etc), for him I'm only really providing housing, child care (no cost associated) and transportation. Come tax season, would I claim her as my dependent and she claim him? Do I claim both? Am I even able to claim her?