A 75-year-old with a pneumothorax and a chest tube.
A 54-year-old who is 5 feet (152.4 cm) tall and weighs 300 pounds (136.1 kg).
A 2-year-old who is demonstrating diaphragmatic breathing.
A 45-year-old long distance runner with a body mass index (BMI) of 18 kg/m².