Section B Marking scheme

Sir, I was wondering if you could clarify my doubt as to the marking scheme in section B of the F5 paper.
As per my understanding, there are 3 questions in section B with 5 sub questions worth 2 marks each, which brings the total to 30 marks for section B.
Now if I happen to get say, 2 out of the 5 sub questions wrong from a particular question, do I loose all 10 marks or am I still awarded 6 marks out of the 10 total marks.

Thanks.