During examination, a doctor performed auscultation to assess the functioning of the patient's mitral valve. Where can the sound of this valve be auscultated?

Answer options

1. At the edge of the sternum, in the second intercostal space on the left
2. At the edge of the sternum on the left, over the fifth costal cartilage
3. At the edge of the sternum, in the second intercostal space on the right
4. At the apex of the heart
5. At the edge of the sternum on the right, over the fifth costal cartilage