$$ \text{A square loop of sides } a=1\,m \text{ is held normally in front of a point charge } q=1\,C. \text{ The flux of the electric field through the shaded region is } \frac{5}{p}\times\frac{1}{\varepsilon_0}\,Nm^2C^{-1}, \text{ where the value of } p \text{ is } \underline{\hspace{1cm}}. $$