The total impedance seen by the current source is $Z_{total} = j4 + \frac{j2 \times j8}{j2 + j8} = j4 + \frac{-16}{j10} = j4 + j1.6 = j5.6\Omega$.
The current through the parallel combination of $j2\Omega$ and $j8\Omega$ is $I_{parallel} = 2\angle 90^\circ \times
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