Please help me understand why are the answers the circled ones only need help with 53,56, and 57. I would like a detailed explanation on why are those the answers?

44 40 Price (dollars per shirt) 28 24 20 16 12 16 24 32 40 48 56 64 Quantity (millions of shirts per year) The figure shows the market for shirts in the United States, where D is the U.S demand curve and S is the U.S. supply curve. The world price is $20 per shirt. The United States imposes a tariff on imported shirts, $4 per shirt. 51) In the figure above, with the tariff American consumers million shirts per year. A) 32 (B)40 C) 16 D) 48 52) In the figure above, with the tariff the United States imports. million shirts per year. A 16 B) 32 C) 24 D) 8 (53)In the figure above, the tariff U.S. imports of shirts by million shirts per year. "A) Hecreases; 16B) increases; 8 C) increases; 4 D) decreases; 8 54) In the figure above, the tariff_ the domestic production of shirts in the United States by per year. ncreases; 8 million B) increases; 4 million decreases; 8 million D) decreases; 16 million $5) In the figure above, the U.S. government's revenue from the tariff is $64 million B) $128 million C) $32 million D) $48 million * * 56) In the figure above, U.S. consumers' from the tariff is A) loss; $80 million loss; $176 million C) gain; $128 million D) gain; $64 million *57) in the figure above, U.S. producers' from the tariff is A gain; $128 million B) loss; $64 million C) loss; $32 million D) gain; $80 million