a) Can you aim at a specific target even if it partially obscured e.g. second rank of a shieldwall
b) If Two figures are in combat and the shooter is at 90 degrees to the target without it being obscured by the friendly figure, would they still have to roll to see if they hit an obscured opponent ?
A) Yes you can target a model that is behind another. When doing so, you will need to make an In The Way test to see if you hit the model in front instead.
B)Yes you need to make an In The Way test whenever you are shooting into combat regardless of the angle.