price elasticity of demand is percentage change in quantity demanded over percentage change in price
so work out the percentages and just plug in the values
hey if you go student central to get your student transcript, they can do it in a couple of hours, but it costs $25 from memory
EDIT:
https://my.unsw.edu.au/student/atoz/AcademicTranscript.html#FastServiceTranscriptRequests
depends on the lecturer/tutor you have, some like to finish right on time, or others go a little past. If it is a lecture, you could always just walk out at 5 to or 10 to, otherwise you'll end up late like me, if you have to walk from Science Theatre to Biomed
according to class timetable website, it doesn't list semester 2, so i guess its very likely that it won't be offered in semester 2
http://www.timetable.unsw.edu.au/2009/ACCT3708.html