Damage on the stack question.

[PandaPokemon]

If I had a goblin and I attacked.  In response, my opponent declares blockers blocking the goblin with his exalted angel.

If I put damage on the stack, and then used Siege Gang Commander's ability to sacrifice the goblin and do damage to somebody or something,

Does :
1) My opponent get the life gain?  Or is no damage dealt since the creature the damage is going to be dealt to is no longer in play.

2) The goblin still does damage to the angel right?  (Pretty sure yes for this but just asking heh)

Thanks!

[Jebus]

1.  THere is nothing in play for the Angel to deal damage to, so no damage is dealt.  No life is gained.

2.  The goblin will still deal its damage as assigned, even though it left play.