The circle above is a mathematical loop, which lies on the page. On the flat surface bounded by the circle, there is a uniform electric field that is perpendicular to the page but the magnitude of the field changes with time, i.e. E(t). Outside the circle, the electric field is zero. A long straight wire (indicated by the black dot) passes through the flat surface bounded by the circle. The wire is perpendicular to the surface and carries a current of 40 ampere. The magnetic field at every point on the circular mathematical loop is zero. Calculate the displacement current