Determine whether the polygons with the given vertices are congruent or similar. Use transformations to explain your reasoning. a. Q(2, 4), R(5, 4), S(6, 2), T(1, 2) and W(6, -12), X(15, -12), Y(18, -6), Z(3, -6) b. A(-6, 6), B(-6, 2), C(-2, -4) and D(9, 7), E(5, 7), F(-1, 3)