help!!

Assess the following four tax policies in terms of the benefits principle versus the ability-to-pay principle.

a.A tax on gasoline that finances maintenance of state roads

b.An 8% tax on imported goods valued in excess of $800 per household brought in on passenger flights

c.Airline-flight landing fees that pay for air traffic control

d.A reduction in the amount of income tax paid based on the number of dependent children in the household