Gauss's law and its applicationsHard

Electric Flux through Square Loop

A square loop of sides a = 1 m is held normally in front of a point charge q = 1C. The flux of the electric field through the shaded region is $\frac{5}{p} \times \frac{1}{{{\varepsilon _0}}}\frac{{N{m^2}}}{C}$ , where p is :-