Regarding order of questions

Yes, in whatever sequence, you are convenient with.

Good luck!!!

You ought to write the best answer first to create a good impression to the examiner. There is no hard and fast rule that you need to write in a sequence. The 6th question in exam can be written 1st and so on, which you think that’s the easiest for you. This will also aid you in gaining confidence and enable you to write answers well for other questions too.

Only thing you have to be careful is to answer the sub-parts of a question in same order. If suppose question 2 has three sub-questions a, b, & c, then you must ensure all the answers of 2nd question is answered at one place, do not scatter writing the answer for Q2a in page 4, Q2b in page 10 etc.