year- old woman has 2-year history of progressive shortness of breath and occasional cough. She has no fever, hemoptysis, chest pain, orthopnea, or wheeze, she is a non-smoker. On examination, she is obese, afebrile, HR 88/min, BP 155/95 mmHg, RR 20/min. There is NO clubbing, cyanosis, lower limb edema or lymphadenopathy. Chest examination reveals vesicular breath sounds with bilateral inspiratory basal crackles without any wheeze. High resolution CT chest shows a parenchymal lung disease Which of the following findings will be expected in her pulmonary function test (PFT)?