Four individuals are currently not working standard full-time hours in an economy:

• Indra: a 28-year-old on a zero-hours contract who worked 2 hours last week but wants to work 40 hours.
• Julian: a 52-year-old who was made redundant 3 months ago, wants a job, but stopped searching 6 weeks ago because they believe no vacancies exist in their area.
• Katarina: a 19-year-old who left their job last week, has applied for four retail roles this week, and is available to start immediately.
• Leanne: a 31-year-old who is currently on 6 months of paid maternity leave from their corporate position.

Under the International Labour Organisation (ILO) guidelines, which of these individuals is classified as unemployed?