A particle with charge +Q produces a certain electric field. If a second particle with the same charge +Q is placed 1 cm away from the first, the magnitude of the new electric field (produced by both particles together)

1. is twice what it was before.
2. is four times what it was before.
3. is smaller than before.
4. is larger in some places and smaller in other places.
5. is the same as before.