Написать по что делают эти люди : dancer,doctor,policeman,sailor,postman,singer,tailor пример: a grocer is a person who sells sugar

A dancer is a person who dance
A doctor is a person who heal people
Policeman is a person who help people
A sailor я не знаю
A postman is a person who give letter to people
A singer is a person who sing song
A tailor тоже не знаю