Need help in A2 MCQs!

[Sijan92]

Hey guys I really need help in A2 Economics. Can anyone help me out in some of the mcqs from 09 May paper3 ?
http://www.xtremepapers.com/papers/...d AS Level/Economics (9708)/9708_s09_qp_3.pdf

Q8. Why is the answer B?
Q11. Why is the answer C?
Q27. Why is the asnwer A?
Q29. Why is the asnswer D?

Thank you