About a decade ago, Apple iTunes was big. Its business model was to sell you hardware called an ipod, and after that, sell you songs one at a time that (in theory at least) you owned forever. The price was $1 per song. Much of the money that went to iTunes now goes to streaming services like Spotify. Their model is to let you access almost any song, but only while you pay a monthly fee. a) Based on the discussion on tying in CT and lecture, do you think iTunes was an example of tying? b) Does Spotify seem like an example of tying, or of bundling? Discuss briefly.