Yes any baby born before 37weeks gestation is considered premature, regardless of weight/ measurements x
Yep. My baby was born at 36+5 and is considered 4 weeks early by medical professionals. She weighed 6lb 11oz. In her red book (at 7 weeks) she was considered 90th percentile based on her adjusted age of 3 weeks but for a 7 week old she would be around 50th. They will continue to measure her like this until she is 1 year old.
Yes, still considered premature. Size doesn't necessarily mean everything is fully developed for the outside world