What elasticity measure or measures would be useful in answering the following questions? a. Will cheaper transport into the central city help to

What elasticity measure or measures would be useful in answering the following questions?

a. Will cheaper transport into the central city help to keep downtown shopping centers profitable?

b. Will raising the bulk postage rate increase or decrease the revenues for the U.S. Postal Service?

c. Are producers of toothpaste and mouthwash in competition with one another?