Electromagnetic Induction and Alternating Currents: JEE Main 2020 Physics question

A loop ABCDEFA of straight edges has six corner points A(0, 0, 0), B(5, 0, 0), C(5, 5, 0), D (0, 5, 0), E(0, 5, 5) and F(0, 0, 5). The magnetic field in this region is $\overrightarrow B = \left( {3\widehat i + 4\widehat k} \right)T$ . The quantity of flux through the loop ABCDEFA (in Wb) is _______.