1) to answer this would demand the ability of a god. (notice the small g)

2)we cant know if its physically finite until we find the edge. we cant know if its temporally finite unless we can defined time beyond the boundaries of what we know.

3) we will be able to fully defined the universe only when we fully understand the universe. until then the question cant be accurately answered. we dont even know if there are more dimensions than we already know of.

the more man learns, the more he realises, he really does not know anything.