E=-\FRAC{\PARTIAL V}{\partial x}\mathbf{\HAT{i}}-\frac{\partial V}{\partial y}\mathbf{\hat{j}}-\frac{\partial V}{\partial Z}\mathbf{\hat{k}}\] \[\Rightarrow \] \[E=-6y\mathbf{\hat{i}}-(6x-1)\mathbf{\hat{j}}-2y\mathbf{\hat{k}}\] At, \[(1,\,1,\,0),\] electric field can be expressed, \[E=-(6\times 1\mathbf{\hat{i}})-(6\times 1-1)\mathbf{\hat{j}}-2\times 1.\mathbf{\hat{k}}\] \[=-(6\mathbf{\hat{i}}+5\mathbf{\hat{j}}+2\mathbf{\hat{k}})N/C\]