I took it last year, had 88 until the exam...
Neways, for the tests, instead of suffering from CAPA (unless you have extra time and aim for 12),
work on the exercises, they are good representation of the tests.
(CAPA has more calculation while the exercises are conceptual)
Then, go to these websites (they are from different universities)
They have ppts with questions, answers and explanation
It helped me out great
:Click on Chap 20 and on only
If the first few chapters are not there, just google the questions from the exercises and youll be able to find ones similar