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Alexander and his friends are planning to visit several Scandinavian countries.

1 Are Alexander and his friends planning to visit several Scandinavian countries? 2 Are Alexander and his friends planning to visit several Scandinavian or Italian countries? 3 Alexander and his friends are planning to visit several Scandinavian countries, aren't they?4 Who is planning to visit several Scandinavian countries? 5 What countries are they planning to visit?