A 76-year-old woman presents with fever, pleuritic chest pain and productive cough. Chest X-ray shows right lower lobe consolidation. Her observations: confusion (new), urea 9.5 mmol/L, respiratory rate 32/min, blood pressure 86/54 mmHg, age 76 years. What is the severity of her community-acquired pneumonia using CURB-65 and the most appropriate disposition?