It's not that Irodov problem number 3.24

A cube of side length $l= \sqrt3 \text{ m}$ is placed such a way in space such that its main body diagonal is $z$ -axis and other perpendicular axis are $x$ and $y$ . The origin is at the body center of cube. An electric field is defined in a space such that $E=\dfrac{a(x i + y j)}{x^2 +y^2}$ . Find the electric flux through cube due to this field, where $a= 7/22$ SI units.