2.
I have a work which is already done (or which I can complete
in short time). Should I send it soon or wait until the
deadline?
You better check it carefully, but send your work as soon
as possible. If all participants send their works close
to the deadline, there could be the risk of a long queue,
a long wait, a possible hitch, and hurried evaluation,
which could be inadequate in the case of a scientific
evaluation.