Answer:
a. Small automobiles become more fashionable:
demand curve will shift to the right, increasing total quantity demanded and prices
b. The price of large automobiles rises (with the price of small autos remaining the same):
demand curve will shift to the right, increasing total quantity demanded and prices
c. Income declines and small autos are an inferior good:
demand curve will shift to the right, increasing total quantity demanded and prices
d. Consumers anticipate that the price of small autos will greatly come down in the near future:
demand curve will shift to the left, decreasing total quantity demanded and prices
e. The price of gasoline substantially drops:
demand curve will shift to the left, decreasing total quantity demanded and prices