1) a working relationship is different because of boundaries, professional codes of conduct, employer policies and procedures. in your working relationship you would befriendly have a different approach treat with equailty you would know your role and responsibilty you would not share personal information as you you friends.
2) you work with different people doctors family colleagues give examples of how these are
3) as this sets out boundaries in your job role , enables you to know your role and responsibilitys, knowing your own level of competence and skills, to know your job description
hope this hepls