Use graph paper for this question (Take $2\mathrm{cm}=1$ unit along both $\mathit{x}$ and $\mathit{y}$ axis). $\mathrm{ABCD}$ is a quadrilateral whose vertices are $\mathrm{A}\left(2,2\right),\mathrm{B}\left(2,-2\right),\mathrm{C}\left(0,-1\right)$ and $\mathrm{D}\left(0,1\right)$.
(i) Reflect quadrilateral $\mathrm{ABCD}$ on the $\mathit{y}$-axis and name it as ${\mathrm{A}}^{\prime }{\mathrm{B}}^{\prime }\mathrm{CD}$.
(ii) Write down the coordinates of ${\mathrm{A}}^{\prime }$ and ${\mathrm{B}}^{\prime }$.
(iii) Name two points which are invariant under the above reflection.
(iv) Name the polygon ${\mathrm{A}}^{\prime }{\mathrm{B}}^{\prime }\mathrm{CD}$.