input: Write a python function to create a list of Employee objects given a list of first and last names.
  assert create_employees([("John", "Doe"), ("Jane", "Smith")])[0].first_name == "John"
  assert create_employees([("John", "Doe"), ("Jane", "Smith")])[0].last_name == "Doe"
  assert create_employees([("John", "Doe"), ("Jane", "Smith")])[1].first_name == "Jane"
  assert create_employees([("John", "Doe"), ("Jane", "Smith")])[1].last_name == "Smith"
output: class Employee:
      def __init__(self, first_name, last_name):
          self.first_name = first_name
          self.last_name = last_name
  
  def create_employees(names):
      return [Employee(first, last) for first, last in names]