NB even if you have the printed answers, if you have difficulties with any problem, take a look at the Web answers.
I have tried to expand them where I have noticed points which gave students problems.

Please let me know of any difficult points you have so I can add more to the answers, or to the FAQs.
 
 

Problem Sheet 1	Answers 1
Problem Sheet 2	Answers 2
Problem Sheet 3	Answers 3
Problem Sheet 4	Answers 4
Problem Sheet 5	Answers 5
Problem Sheet 6	Answers 6

 
Geoff Hall