A few KV rule questions

How is Scattergun fire vs regular missles handled? We handled it with 5
or 6 on a 1d6 kill sit.

How are scatter gun fire vs SMLs handled? We dealt with it similar to
Fighters. 1d6= how many missles shot down.

Can scatterguns fire out teh rear arc on a turn when teh main drive was
running?

Thanks...

Los (In middle of huge battle)