Yusuf's co-worker is usually very cheerful but he notices that they have barely spoken for the past few days. When Yusuf approaches them, they say 'Something very serious has happened between me and someone else in this company, but I just can't tell you about it. The problem is I don't know what to do'.

Required 

Without knowing exactly what the problem is, what advice could you give your coworker about how to work through the problem and where to go for help?