$1.$ Applying various industry analysis models, explain how the music industry has evolved from physical sales to digital downloads. In particular, apply Porter's Five Forces model and examine the industry's attractiveness from the recording companies' perspective before and after Napster's entry.

$2.$ What are Apple's primary threats and opportunities in the streaming music era?

$3.$ What strategic options are available for various players in the industry $($for example, recording companies, retailers, and online distributors$)?$ How can each of these players set a strategy in this dynamic industry?