Pneumothorax tension pneumothorax soap

In which patient would you most suspect a primary spontaneous pneumothorax?

1: A 65-year-old obese man with a history of hypertension
2: A 32-year-old woman with cystic fibrosis
3: A tall, thin 18-year-old male smoker without previous lung disease
4: A 45-year-old man with lung cancer