The coordinates of the vertices of △DEF are D (1, 2) , E (2, 0) , and F (−1, 0) . The coordinates of the vertices of △D′E′F′ are D′ (1, −4) , E′(2, −2) , and F′ (−1, −2) .

What is the sequence of transformations that maps △DEF to △D′E′F′ ?

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A sequence of transformations that maps △DEF to △D′E′F′ is a followed by a .