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Determine the net flux of the vector field F(x, y, z) - 2x*ya, + za, + ya, emerging from the unit cube Osx, y. z=1. (15) (b) Also obtain the net flux for the same vector field F as above using divergence theorem (10) At time f = 0, excess free charge of volume density p, is injected into the interior of a conductor. Find the time for the charge density to decrease to 1/e of its initial value. Assume uniform conductor properties, (15)