My PERM got audited and already a total of 7½ months have passed (3 months since audit response was sent). I have only 2 more months left on my H1-B's 6 year limit. In case I do not get a decision about PERM and I apply for COS to F-1, I have following questions:

1- Will there be more chances of COS to F-1 getting denied because of PERM process and immigrant intent?
2- Will there be more chances of COS to F-1 getting denied because by the time of adjudication of COS to F-1, I will already be in US beyond my H1-B 6 year limit?
2- If COS to F-1 gets denied and I leave the US immediately after that, will it still affect PERM and subsequent GC process negatively?
3- Will a denial of COS to F-1 also trigger NTA according to new rules?

Thanks !