Predictions for IGSCE Chemistry Grade boundaries?

Im currently prepping for MCQ Chemistry igsce paper 2 variant 2 and i wanted to ask according to the unique Paper 4 v2 that has been done im prediction that an A for it would be around 43-45 and for the P6 it would be around 29-31 for an A So if these were the approx grade boundaries and i got 57 in P4 and 36 in P6 how much would i need in the MCQ to secure an A?