The basic characteristics of, and differences between, popular culture, high culture, and folk culture

What are the basic characteristics of, and differences between, popular culture, high culture, and folk culture? How can they be distinguished in terms of how they are produced? Please make sure to use the definitions I have in the lecture and not something that you find online.

In addressing this you should not simply rely on common sense. Instead, be prepared to answer why, for example, opera is regarded as high culture today. In other words what are the social relations or social support networks associated with each of these types of culture? What is different about the way these forms of culture are produced and consumed?