The 11-month-old, previously healthy infant is brought to the emergency department after becoming increasingly lethargic over the past 24 hours. The infant’s vital signs are notable for a temperature of 40.8°C, heart rate 138 bpm, respiratory rate 31, and blood pressure 84/50 mmHg. Upon assessment, the nurse notes sensitivity to light and sound, bulging anterior fontanelle, and significant resistance to turning the head. Place the interventions in the correct order.