yeah dont worry about 4–6 marks , the examiner will give you some marks to get passing marks. As no teacher wants to fail a student.
Definitely you will passed out, because 4-5 marks doesn’t create any matter to loose your specific subject and if you will get 17 or 18 and teacher who check your copy not stop you to pass, he always thinks that by his one wrong step the student future will spoil, so he gives marks for your handwriting, neat & clean copy and your efforts. If the student who neither wrote anything the whole copy is blanked, then he will be failed. But this things are not apply always may the teacher is strick so try to mark the finishing line always.I wish you will definitely pass.