Question 1 and 2

The question why were you born is not the same as the question why were you created. Since that is the case, one answer is not the same as the other. Why you were created by God involves a more complex answer but why you were born is simple enough so that its very simplicity makes in overlooked and subsequently mostly unknown. Why is any human-being born? The reason you were born is to come to the realization, that while you were previously dead for millions of years, life itself was and remains eternal and this is your chance to acquire that life by recognizing and gaining favor with its Originator.
Simple enough so far, But why were you created?  Before the creation of mankind, not only was the creation of the universe complete but life was granted existence at least 3.55 billion years ago. That is a pretty good length of time for God to have been apparently pleased with his activities. So why after such as extended length of time would God create something (mankind) which is unique or at least recognized as being significantly different than what He had been pleased with for those number of billions of years. Many of the earliest prophets stated that they were told by angels that time itself was running out and that the earth was already very aged. These statements were mostly ignored or dismissed and this idea declared by the prophets considered wrong. Generations of humans came and went and no evidence that time was running out was apparent. So this prophecy was for the most part ignored all together, although it was written down and still remains available for reference today
Just when the angels were created is open for conjecture; they might have been created before the tangible universe over 4 billion years ago. It could be argued that the angels came into existence before the creation of our universe since during the Days of Creation God apparently is having a conversation with beings other than Himself. Life on earth came about rather early on, before the rotation of the earth was fixed according to the record. So from the point of view of the angels the end of the world, although several thousand years away , would have seemed short compared to the several thousand million years that had been observed by those angels.
The living creatures on earth before man do not have the ability to understand the complexity of their own creation or the intellect behind it. Nor would they understand the end of it all. Mankind however can recognize the creative process and can understand the concepts of ‘beginning’ and ‘ending.’ Certainly it seems that mankind was created as the only life form in this world to have the potential of that understanding. Mankind then can bear witness to all of the prophesied events as they unfold and some of mankind will be instilled with eternal life and the responsibility to bear witness from this perspective for eternity. The early prophecies also state that the ‘end of time’ will come about only when the earth is holding as many ‘men’ as it can sustain. This vast multitude would understand, witness, and offer eternal testimony to the final chapter in God’s strategy to reveal the past and the wrap-up of this era, which the angels considered soon to come. And it is for that reason you were created.