Group actions

Player declared Group Assault. Then one of his models can not fit to battle or is out of range.
What happens?

  1. The failed model moves as close to the target as it can - due to its speed and obstacles/other models.
  2. The failed model is expelled from action and stays where it started.

Again player declared Group Shoot, models moved but one of them can not get LOS or is out of range.

  1. Model fails to shoot but is moved.
  • it may be that player initial intention was, to only move that unit
  1. Model is expelled from action.

Can casting attack spell (with dices in title) be used as a part of Group Shoot?