I need help answering these economic industrial relations question please.

1.What circumstances might justify an employer asking employees about their intentions if a labour disruption is anticipated?

2.In many workplaces, there are employees in what has been called "precarious employment", e.g. temporary, limited-term contract, or part-time work. Do you think those employees might react differently than permanent or full-time employees to employer requests? Is an employer obliged to consider any such differences in status when communicating with employees?

3.What operational issues might an employer need to deal with if a picket line is set up at the workplace?