2. 'A competitive strategy is vital to an international business.' Therefore: a) Describe the main attributes of a differentiation strategy compared to a focus strategy, using illustrative examples. (8 marks) b) What are the main strengths and disadvantages of adopting a resource-based approach to strategic positioning in today's international business environment? c) (8 marks) Assess three different approaches an international business can use to carry out environmental analysis. (9 marks)