A 40-year-old traumatic brain injury patient with significant neurological impairments, who is ambulatory for short distances with a walker, was admitted into your facility. He is partially dependent with dressing, feeding, and bathing. His caretaker states he developed a productive cough of yellow-green secretions, had a fever, and was sleeping more than usual. He was diagnosed with right lower lobe aspiration pneumonia. Your P.T. role in treatment is: *