Using an industry of your choice, identify two firms that would be indifferent strategic groups and (i) describe the business-level competitive strategies they are pursuing and what they are most vulnerable to, (ii) the nature of their competitive advantage(s) in terms of their specific bases & strength/sustainability and (iii) how industry life cycle stages should be factored into firm decisions. A good answer shows an understanding of the terminology and its clear application to a specific industry context.