This
display is based on a typical examination question. You can change some of the
details in the question and then see the solution, step by step.
An interactive illustration of the
problem
Summary
The above example is a typical examination question based on
a recent paper. You must not assume that this is all that you can be
asked. There are various types of questions on this topic. You need to
practice as many past examination questions as you can, writing out specimen
answers and checking them with a tutor. Find out at your school or college
where you can get past examinations questions from.