To calculate the flux integral through the surface shown below the correct area element(s) is/are: (a) d A = k dxdy (b) d A = j dx dz O(c) d A = i dy dz (d) d A = (sing cos 0 7 + sin q sine j + cos ( k ) R2 sing do de (e) d A = (cos 0 7 + sine ] \\ R2 dz de O ( f ) d A = (- f x 7 + f , 7 + k) dxdyCompute the flux of the vector field F = (x - y) i + z j + 3x k through the surface S where S is the part of the plane z = x + y above the rectangle 0