Illustrate graphically how each of the following events will impact the demand for cups of coffee. And notify the direction of the graph (if it will shift to the left or right or stay stable).

a. Average hourly wages increase in the U.S.

b. The state of California requires all coffee houses to post warnings to consumers about the cancer-causing components of coffee.

c. Coffee houses increase the price of coffee in order to pay their baristas more.

Utilize the demand curve labeled c to answer this section.