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