A 68-year-old male with a 12-year history of coronary artery disease (CAD) and angina pectoris was admitted due to severe retrosternal pain lasting 8 hours after emotional agitation. No history of hypertension (HTN). Blood pressure (BP) on admission was 150/90 mmHg. Diagnosed with acute inferior wall myocardial infarction. The electrocardiogram (ECG) localization is: