What issue generally determines whether an employer may monitor an employee's activities electronically?

1) What issue generally determines whether an employer may monitor an employee’s activities electronically?

2) What steps should an employer take to insure that it would be legally permissible to monitor employee’s use of electronic devices, such as the computer or cell phone, at the work place?

3) What is an employer’s legal obligation upon hiring employees to insure against the hiring of illegal immigrants?

4) Discuss shortly the concepts of collective bargaining and strikes in the context of permissible union activity. Are strikers guaranteed their old jobs back after the strike ends?