These are the correct answers, I say it because I speak Spanish.
1. tiene (possessive description)
2. sepa (non-realistic description; an ideal)
3. está (possessive; the clinic (not a clinic))
4. ayude (ningún, alguien, and nadie are always subjunctive)
5. pueda (an ideal; a surgeon (may or may not exist) and not the surgeon)
Answer:
In an effort to make the boy happy at each of these stages, the tree gives him parts of herself, which he can transform into material items, such as money (from her apples), a house (from her branches), and a boat (from her trunk). With every stage of giving, "the Tree was happy".
