Thanx a million. Just what I needed!
The problem for us at Bristol is not that we have to know the answer, but that we have to know why that answer is correct, so we have gone pretty deep into this particular problem - more than anyne would need to know for the exam.
As a general problem, the JAR syllabus keeps on expanding as one nerd after another tries to add in his own bit of specialist knowledge - but don't get me going on that one.
Hope you got the answer, Rowley!
Dick W