Replying to Macbeth Act 5 Scene 9

This has to do with the play Macbeth. Alright so I have to make up dialog for scene 9 which is non-existent.

It must include...
-Macbeth's ghost
-Duncan's ghost
-Banquo's ghost
-Lady Macbeth's ghost

Setting...
The setting of the play is at Scone during Malcom's coronation. The ghosts are there observing the ceremony. They can see and talk to each other, but no human who is alive can see them or talk to them.

Required Elements...
-It must include the words Graymalkin(a cat), cherubin(angel), surcease(death), warder(gaurdian), fume(smoke).
-Each of the main characters must make reference to something they said during the play when they were alive.

Please help me out, because this is worth 100 points. If I don't do this my grade will drop to a C or something and my dad won't let me ski. Help me out and I'll give you some karma and you'll feel good about yourself. Thanks!