1. The problem asks for the coordinates of vertices A and B after reflecting the shape about the line $y = x$. 2. Reflection about the line $y = x$ swaps the $x$ and $y$ coordinates of any point. That is, a point $(x, y)$ maps to $(y, x)$. 3. For vertex A at $(-2, 1)$, after reflection, the coordinates become $(1, -2)$. 4. For vertex B at $(-4, 1)$, after reflection, the coordinates become $(1, -4)$. Final answers: - Vertex A maps to $(1, -2)$. - Vertex B maps to $(1, -4)$.