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The vertices of a polygon ABCDEF are A(- 4, 6), B(-3, 2), C(-7, 1), D(-7, 4), E(-8, 5) and F(-7, 6). Find the final image of the polygon under the reflection in the line:
(a) y = x, followed by a reflection in y = -x.
(b) y = x, followed by a reflection in y axis, and finally followed by one in the line y = -x.