The presentations have many computer generated animations and effects to help students visualise the concepts required for this question.
The full question, together with a step by step solution and the marking scheme will give students maximum understanding of the topic and level of difficulty of questions from the past seven years. The opening slide provides an index which allows you to select a specific year. Animations are controlled with either the arrow left or arrow right button on your keyboard or the left mouse button.
You control the pace of the animations to suit your level of understanding