As shwon in the figure, a point charge $q_{1}=+1 \times 10^{-8} C$ is placed at the origin in $x$ -y plane and another point charge $\mathrm{q}_{2}=+3 \times 10^{-6} \mathrm{C}$ is placed at the co-ordinate $(10,0)$. In that case, which of the following graph(s) shows most correctly the electric field vector in $\mathrm{E}_{x}$ in $\mathrm{x}$ -direction?