The diagram shows the effect of the United States (US) imposing a tariff on the import of steel in 2018.
Which statement about the impact of the tariff is correct?

1 )
Consumer surplus falls from ${P_1}$TO to PUO.
2 )
Domestic output increases from $O{Q_1}$ to $O{Q_3}$.
Imports fall from ${Q_1}{Q_4}$ to ${Q_2}{Q_3}$.
4 )
The tax revenue raised on imports is ${P_1}YWP$.
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