Explain whether each of the following statements describes a change in demand or a change in quantity demanded, and specify whether each change represents an increase or a decrease.

a. Julio believes the price of tires will rise next month, so he purchases a set of 4 for his pickup truck today.

b. After an article is published asserting that eating kale causes hair loss, sales of kale drop by 75 percent.

c. The Oink-N-Chew company experiences a significant decline in sales when it doubles the price of its bacon-flavored bubblegum.

d. An increase in the federal minimum wage results in a decline in sales of fast food.

e. An unexpected decrease in the price of peanut butter results in an increase in banana sales.