input: Write a python function to create a class `Person` with a method `introduce_self` that prints "I'm {name} aged {age}." where {name} and {age} are attributes of the class.
  assert create_and_introduce_person("John", 25) == "I'm John aged 25."
  assert create_and_introduce_person("Alice", 30) == "I'm Alice aged 30."
  assert create_and_introduce_person("Bob", 40) == "I'm Bob aged 40."
output: def create_and_introduce_person(name, age):
      class Person:
          def __init__(self, name, age):
              self.name = name
              self.age = age
  
          def introduce_self(self):
              return f"I'm {self.name} aged {self.age}."
  
      person = Person(name, age)
      return person.introduce_self()