Which of the following scenarios are examples of direct discrimination, and which are examples of indirect or systemic discrimination? What prohibited ground(s) might apply in each case?

1. A rule requires all employees to stand for their entire seven-hour shift.
2. A women's prison advertises jobs for "female prison guards."
3. A bar hires only women to be servers and only men to be kitchen staff.
4. An airline requires pilots to retire at age 60.
5. An employer stipulates that all employees must be able to carry 20-kilogram boxes from one side of the factory to the other several times per day.