Updated : 23/06/2015
YES – (As the child of the partner of an EU national) because as a student he's dependent on you, even though he's over 21.
NO – In the Netherlands, she'll be treated the same as any other spouse.
For a stay of less than 3 months, all she needs is a valid passport (though she might also need a visa, depending which country she's from).
She might also have to report her presence in the country and should carry her passport at all times.
NO – But you can ask the Norwegian authorities to consider their application. If the Norwegian authorities refuse residence, they must justify their refusal, which they can only do after extensive research into your personal circumstances.