求一道推理题的解 会英语的来

求一道推理题的解 会英语的来
There are four good friends in a city.Their names are Andrew Smith,Sam Miller,Henry Hall and Frank Green.They have different jobs.One is a doctor.One is a teacher.One is a driver and one is a farmer.
(首字母不大写了）
one day andrew's son is ill,so andrew takes him to see a doctor.the doctor 's sister is just henry' wife.we know andrew isn't a driver.and the farmer isn't married.the farmer has many good hens,so he often sells eggs.sam buy eggs from the farmer every week.the teacher sees henry every morning because they live in the neighborhood.what do they do?now piease tell me.
(不是要你翻译 是叫你推理出各自的职业）