Which of the following conditions are true: (1) if Xiao Wang is a worker, then Xiao Zhang is not a doctor; (2) or Xiao Li is a worker, or Xiao Wang is a worker; (3) if Xiao Zhang is not a doctor, then Xiao Zhao is not Students; (4) or Xiao Zhao is a student, or Xiao Zhou is not a manager. Which of the following, if true, would lead to the conclusion that "Xiao Li is a worker"? ['Xiao Zhou is not a manager.', 'Xiao Wang is a worker.', 'Xiao Zhao is a student.', 'Xiao Zhou is the manager.']