Final answer:
Chandler's age four years ago is represented by (y - 4) years, and his age in 11 years is represented by (y + 11) years.
Step-by-step explanation:
If Chandler is currently y years old, his age four years ago would be best captured by the expression (y - 4) years. This represents Chandler being four years younger than his present age. In contrast, to find Chandler's age in 11 years, we would use the expression (y + 11) years, indicating that he will be 11 years older than he is now.