Narrow the exam down to just key topics and focus on what you need to just get those potential 50 marks!
By narrowing down the topics to as little as possible, you may actually want to try and learn a few topics knowing that there around 6/7 guaranteed topics to come up, and learning just 6/7 topics properly isn’t that much – hope that helps!
Nobody can make you focus, except yourself, spend 30 mins at a time with a 10 min break.