†15. a. In the early 20th century, there were many local opera and theatre companies and other local providers of musical entertainment. With the rise of mass me- dia and duplicative technologies (such as television, radio, and recordings), many of these local services disappeared. What do you think happened to the demand for the services of performers with extraordinarily high charm or talent (the Lu- ciano Pavorrotis, Britney Spearses, and Tom Cruises of their day)? What do you think happened to the equilibrium price of the services of the most exceptional individuals? How do you think