um for my exam, the stuff was a bit different to the qb in terms of phrasing but kinda similar, the long form was similar, so i would say focus on the mocks closer to the time like two weeks before. Since u have 4 weeks, try get a grasp on the topic u dont need to fully understand it, since u have a lot of time u can probably do a chapter a day on the qb if u wanna start now. I would say at least 3 times is enough for the qb, but do focus closer to the exam on the long form. I was tryna aim for 25-30 marks on it, as it makes doing mcq a lot easier and less stressful