What effect does a $1 specific tax have on equilibrium price and quantity, and what is the incidence on consumers, if the following are true:

a) The demand curve is perfectly inelastic.

b) The demand curve is perfectly elastic.

c) The supply curve is perfectly inelastic.

d) The supply curve is perfectly elastic.

e) The demand curve is perfectly elastic and the supply curve is perfectly inelastic.

• Use graphs and math to explain your answer.