State whether each of the following events will result in a movement along the demand curve for McDonald's Big Mac hamburgers or whether it will cause the curve to shift. If the demand curve shifts, indicate whether it will shift to the left or to the right and draw a graph to illustrate the shift.
a. The price of Burger King's Whopper hamburger declines.
b. McDonald's distributes coupons for $1.00 off the purchase of a Big Mac.
c. Because of a shortage of potatoes, the price of French fries increases.
d. KFC raises the price of a bucket of fried chicken.
e. The U.S. economy enters a period of rapid growth in incomes.