List two questions that the author leaves unanswered at the end of The Giver?

I think that two major questions that remain unanswered at the end of The Giver are:  What happens to Jonas and Gabe?  and Are the snow, the sled, the lights in the distance, etc, real, or are they just memories that Jonas has had in the past?  Remember, Jonas could recall that memory often.  Was he using the memory to keep himself alive, or was there really a community out there waiting to welcome the boys in with open arms?  Of couse, we can consider the community that has been left with the loose memories, but does the auther want us to think about the community anymore, or look forward to the possibilities that Jonas and Gabe might face?