input: Write a python function to create an Employee instance with attributes name, salary, and age.
  assert create_employee("Alice", 50000, 30).name == "Alice"
  assert create_employee("Alice", 50000, 30).salary == 50000
  assert create_employee("Alice", 50000, 30).age == 30
output: class Employee:
      def __init__(self, name, salary, age):
          self.name = name
          self.salary = salary
          self.age = age
  
  def create_employee(name, salary, age):
      return Employee(name, salary, age)