Here's the exam: http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2006exams/pdf_doc/info_process_tech_06.pdf
Here's the notes : http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2006exams/pdf_doc/info_process_tech_notes_06.pdf
24c was pretty dodgy... Dp u get what 25 (a) (ii) means??