Sentence 1: Walter went to see a doctor. 
 Sentence 3: They run some tests on him 
 Sentence 4:  His heart was not in a good condition 
 Sentence 5:  A doctor told him to quit smoking immediately 
 Option 1: Walter drank and smoked heavily and refused to quit so the doctor said he couldn't help him. 
 Option 2: He had problems with his heart.