I'm sure they formulated one on a thread somewhere, but it's completely counter-intuitive; looking at the mark scheme now is just silly since you've done the paper, and you'll get what you get, don't freak yourself out by dwelling on it?
My advice is wait until August and then look for the mark scheme to see where you went wrong (particularly important if you're going to resit it), but if not then put your energy into revising for A2. It may seem strange, but even if you get a C (60 UMS) you can
still get an A* (you'd need 100 UMS at A2, but it's FAR from impossible), so just relax.
Breathe and let F212 disappear into the distance, for now atleast