Two shots, and neither of them arrived with any sound on it. These are the layers that go underneath, and you get every one of them as its own file.
Press play. All five layers, at the level they sit at in the film.Now click any track to hear it on its own. Click it again for the whole mix.
Each one is drawn from the finished mix, at the level it actually sits at. The crowd is on the pavement with the camera, so it is loud. The traffic is a block away, so it is the quietest thing in the mix.