input: Write a python function to create a full name for a Person object by concatenating firstName and lastName.
  assert create_full_name(Person("John", "Doe", 25)) == "John Doe"
  assert create_full_name(Person("Jane", "Smith", 30)) == "Jane Smith"
  assert create_full_name(Person("Emily", "Johnson", 22)) == "Emily Johnson"
output: class Person:
      def __init__(self, firstName, lastName, age):
          self.firstName = firstName
          self.lastName = lastName
          self.age = age
  
  def create_full_name(person):
      return f"{person.firstName} {person.lastName}"