Under UN ECE Regulation 46 and the Albanian Road Code, what is the specific purpose and field of view of Class IV wide-angle exterior rearview mirrors (pasqyrat me kënd të gjerë)?

1. To check the tire inflation pressure on the trailer wheels
2. To provide a broad field of view of the adjacent traffic lanes alongside the vehicle, eliminating blind spots when changing lanes or merging
3. To observe the interior seating of the driver cabin
4. To focus exclusively on the front license plate