I thought it was super hard compared to the standard of the practise paper questions. and they say u need no prior knowledge... wat about all the emotions in section 2?? for the cat question, the black cat was being rotated anticlockwise and the white one was being flipped from being upright to...
Hey this is a bit of a general idea, but hopefully it helps.
If u find the gradient of the tangents through differentiation then find the gradient of the normal from that, then the equation of the normals (using the three points) then simultaneously solve the three equations together the result...