How do I get the Sunstone? [T]

Hint 1 of 14:

If you talk to Sophia, you should find out that you need to trick
Trottier into giving it up in a seance.

Hint 2 of 14:

Once you find Trottier, make sure that Indy doesn't patronize him.

Hint 3 of 14:

And make sure you've read enough of the Lost Dialogue that you can
answer the question he asks you.

Hint 4 of 14:

Once you've managed to talk to Trottier, you will need to scare him
into up the stone.

Hint 5 of 14:

Go up to the hotel room to start your trickery.

Hint 6 of 14:

You should find out after a bit of experimenting, that Sophia can't do
anything to trick Trottier.

Hint 7 of 14:

Just make sure that Sophia is subtle when she tries to get Trottier to
leave the Sunstone on the table to convince Nur-Ab-Sal.

Hint 8 of 14:

You have two parts to a scary disguise here in the hotel room.

Hint 9 of 14:

Use both the flashlight and the bed sheet to help you.

Hint 10 of 14:

What kind of costume can you create with these two items?