Exercise: age check

Write a method static int parseAge(String s) that turns a string into an age. If the string is not a number, or the number is below 0 or above 150, the method throws IllegalArgumentException.

• parseAge("30") → 30
• parseAge("-1") → throws IllegalArgumentException
• parseAge("abc") → throws IllegalArgumentException

Constraints: 0 and 150 are valid ages; an empty string is not a number.

Do not add extra imports unless the task says so explicitly.