9. Starbucks estimates that if it changes the price of its popular drink, the caramel macchiato, at all, then its revenues from the sales of caramel macchiatos will fall. What is the PED for caramel macchiatos? 10. 3D cinema has led to an increase in the demand for movie tickets in Philadelphia. As a result, the price of a movie ticket has risen from 17 $ to 22 $, and movie theaters, by offering showings earlier in the day and later into the evening, have increased the number of movies available by 15%. Calculate the PES of movies in Philadelphia. If demand continues to grow, what will happen to theaters' ability to respond to higher prices over time? How will this affect the PES over time