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