I agree with Allune - 1) see here
https://www.immigration.govt.nz/opsmanual/#46507.htm paragraph e i, and 2).
3) Yes, you can send a specialist's report with or after your eMedical (quote all your personal and submission of application details and the eMedical number), so that the answers to questions the MA will have (because your medical will definitely be referred to the medical assessors) will all be there without his/her having to ask for more, it is to be hoped, which will cut down the assessment time.