A 76-year-old woman living in an aged-care facility presents with cough, fever 38.3 °C and shortness of breath. Chest examination reveals right basal crackles. She is haemodynamically stable and oxygen saturation is 94% on room air. Chest X-ray confirms right lower lobe consolidation. She has no recent hospital admissions and can take oral medications. According to Therapeutic Guidelines, what is the most appropriate empirical oral antibiotic regimen?