No. If any entity knows X, then by definition X will occur. X and not X may still both be possible.
It must be magic! Both X and not X could happen! It's a miracle! Praise the lord!
Again, is "possible" an expression of what objectively can happen deterministically (what I call "capacity"), or what subjectively has a nonzero probability of happening based on the witness's knowledge? If the latter, then I agree with (1) for any agent that knows what God knows, but I also don't agree that free will requires that multiple choices subjectively have nonzero probabilities for all observers.
Possibly...