Pаtient:Nаme: J.M.Age: 67 yeаrsSex: MaleHistоry:Pоst-оperative day #1 following open abdominal surgeryFormer smoker (40 pack-year history, quit 5 years ago)No known neuromuscular diseasePain controlled with IV analgesicsAssessment Findings:Breath sounds: Diminished bilaterally at the bases, no cracklesCough: Weak but non-productiveChest expansion: DecreasedSpO₂: 93% on 2 L/min nasal cannulaRespiratory rate: 20/minChest X-ray: Bibasilar atelectasisPatient is alert, cooperative, and able to follow instructionsCurrent Orders:Oxygen to maintain SpO₂ > 92%Pulmonary hygiene as indicatedQuestion:Based on the patient’s condition, which airway clearance or lung expansion therapy is MOST appropriate to initiate at this time?