Four questions about Titanic...?

1. If Jack had survived with Rose to get on the lifeboat, and what
their life together will be like when they get to New York?

2. If Titanic didn't sink and successfully arrived at New York, what
will happen to Rose, Jack, Cal, Rose's mum, etc...? Will Jack ever be
with Rose or Cal will take her away from Jack? Etc...??

3. Titanic movie would have been better if Jack died or lived?

4. In final scene of Titanic, do you think Rose eventually passed away
and gone to heaven to be with Jack? Or is she just dreaming?