The Universe

In class yesterday I wanted to ask if someone who believes in determinism and rejects the idea of God then what do they say created the universe? By being a determinist you believe that since the beginning of the universe every event is determined based on all that has happened. So what created the universe? The beginning of the universe can be argued as the beginning of time, space and everything. What existed before the universe? Nothing. Does determinism not start until the universe and maybe before the universe free will existed? However then the question of for who free will existed if nothing and no one existed.