The number of equations in this question makes it impractical to typeset in html!
Instead, download it as a pdf file.
Note that this outline answer comes directly from my outline answers to the exam paper, and was therefore originally intended for my use, not for students. It is a bit terse, but should get the point across. Even this minimalist outline contains more words than most candidates put on the exam paper – this is the point I was making in the hints.
(2008 Q5(a).)