well the first thing is to get ur syllabus and see what dot points are being asked..and because it is a hsc question there should be markers comments so have a look at those as well
i remember once we had this customer at kmart wanted a pair of shoes for 5 cents instead of the 10 cents which was originally charged for the shoes :rolleyes:
it is very straight forward i think u can have a go at it first because it sounds like u want someone to do it look at ur syllabus see what dot points they are looking at and look in your notes and textbook