You have a friend who teaches fitness classes at a local gym. In order to keep her students moving and mentally motivated, she plays music during her classes. According to copyright law, what is the difference (if any) among the following scenarios?

a.The class music is from a radio tuned to a popular station

b.The class music is from a custom playlist that your friend put together from songs she has paid for (either by downloading them online or purchasing the CD)

c.A student asks if he can buy a copy of the songs played in class so he can use them in his workouts at home. For these cases (songs originate from a radio station or your friend's own playlist), what does copyright law have to do say about your friend selling copies to students in each situation?

d.Would it make a difference if your friend gave out copies of the songs played in class for free? Would it make a difference for any of these scenarios if the classes were held in a public park instead of at a gym that required membership?