Which of the following is not an example where an arbitrator might reverse or modify an employer's disciplinary action because of a violation of the just-cause standard?
1) The employer failed to provide notice of the disciplinary action to the employee.
2) The employer failed to conduct a fair and impartial investigation before taking disciplinary action.
3) The employer failed to provide the employee with an opportunity to respond to the allegations before imposing disciplinary action.
4) The employer failed to follow the proper disciplinary procedures outlined in the employee handbook.