Use a graph paper for this question. Take 2 $\mathrm{cm}=1$ unit along both the axes. (a) Plot the points $A(0,4), B(2,2), C(5,2)$ and $D(4,0) . E(0,0)$ is the origin.(b) Reflect $B, C, D$ on the $y$-axis and name them as $B', C'$ and $D'$ respectively.(c) Join the points $A\ B\ C\ D\ D'\ C'\ B'$ and $A$ in order and give a geometrical name to the closed figure.