A nurse is caring for a newborn 8 hours old. Axillary temperature: 37.1°C (96.8°F). Heart rate: 132/min. Respiratory rate: 52/min. At 36 hours of age: Axillary temperature: 36.1°C (97°F). Heart rate: 160/min. Respiratory rate: 78/min. Which of the following assessment findings require follow-up by the nurse? lowing assessment findings require follow-up by the nurse?