0 indicates a group that has already been mentioned -- de
2 used instead of “he” or “she” when a person’s sex is not known -- han eller hun
3 persons, animals or things already spoken about, being pointed out etc -- de
They are in the garden.
4 used instead of he, he or she etc when the person’s sex is unknown or when people of both sexes are being referred to -- en, man, folk
If anyone does that, they are to be severely punished.