Question d’entretien chez Roland Berger

Case #1: A gas station supermarket is facing a decrease in profits. Why is that and what do you suggest they do? Case #2: A friend is looking forward to invest in a pub in (any well-known residential city). What is the profit margin he should expect? Do you think it is a good call? Case #3: A coffee brand "X" is looking forward to enter the Dubai market. Do you think it should do it?