In-Class #7 Diophantus of Alexandria was born around the year 200. He is known as the Father of Arithmetic. A puzzle about Diophantus is as follows: "His boyhood lasted one sixth of his life. He married after one seventh more. His beard grew after one twelfth more and his son was born 5 years later. The son lived to half his father's final age, and the father died 4 years after the son." Approximately, which year Diophantus died