No title needed

This is more of a discussion. It needs to be no more than one page. Please site references.
Competitive Strategies. Pick an industry (any industry). Classify firms according to the four different roles they might play: leader, challenger, follower, or nicher. How would you characterize the nature of competition?
Do you believe a company can be both a market leader and nicher at the same time? Explain why or why not.

The Book in the class is Marketing Management, Russell S. Winer, 4th ED