What effect will each of the following have on the supply of auto tires?
a. A technological advance in the methods of producing tires.
b. A decline in the number of firms in the tire industry.
c. An increase in the prices of rubber used in the production of tires.
d. The expectation that the equilibrium price of auto tires will be lower in the future than currently.
e. A decline in the price of the large tires used for semi trucks and earth-hauling rigs (with no change in the price of auto tires).
f. The levying of a per-unit tax on each auto tire sold.
g. The granting of a 50-cent-per-unit subsidy for each auto tire produced.