Who completes Willow's final project for her in the novel, Willow?

The Bulfinch is the book that Willow is reading for her final project, and although she was once an excellent student, who loved to read and analyze literature, she has struggled academically since her parents' death. Throughout the novel, Willow struggles to make headway on her final paper but always ends up distracted. At the end of the novel, David writes the paper for Willow as an act of unity with his sister.