Salaam,
Even i need these for one of my friends but i do not seem to find them from anywhere. As soon as i get hold of them, i will let u know. I have heard that the answers are in the AS implementation and assessment guides for teachers and technicians but they are very costly. Their price is about 99.99 GBP. Usually teachers at schools have them. If u study in a school, ask ur teacher if she has the guide i mentioned above and if she has it, ask her if she can photocopy the answers in her implementation guide for u. I think there is a CD-rom with these implementation and assessment guides which also has all the answers to the questions in the student books. Meanwhile, let's wait for someone else to reply. Take care.
