A 150 lb., 62-year-old man has chronic fatigue, productive cough, exertional dyspnea, mild cyanosis, and marked slowing

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A 150 lb., 62-year-old man has chronic fatigue, productivecough, exertional dyspnea, mild cyanosis, and marked slowing offorced expiration. His pulmonary function and laboratory testsfollow:
Frequency
16 breaths/min
Alveolar ventilation
4.2 L/min
Vital capacity (VC)
2.2 L
Functional residual capacity (FRC)
4.0 L
Total lung capacity (TLC)
5.2 L
Maximum inspiratory flow rate
250 L/min
Maximum expiratory flow rate
20 L/min
PaO2
62 mm Hg
PaCO2
Pulmonary function tests after bronchodilator therapy:
Frequency
16 breaths/min
Alveolar ventilation
4.35 L/min
VC
2.4 L
FRC
4.0 L
TLC
5.2 L
Maximum inspiratory flow rate
250 L/min
Maximum expiratory flow rate
23 L/min
PaO2
62 mm Hg
PaCO2
1. What is the disorder of this 62-year-old man?
2. Is this primarily a restrictive or an obstructive disorder?Why?
3. Why is the bronchodilator therapy ineffective in thisman?
4. What causes the hypoxemia in this patient?
5. Calculate the residual volume (RV) for this person before andafter the bronchodilator therapy. Show your work/calculations.
Please explain with as well as possible thank you!