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4. (20 pts) In the balanced 3-phase circuit below, the Y-connected source has phase voltage Van- 12020° V and a positive phase sequence. Given the line impedance R,=2 Q and

the load impedance Z,=60 Z 10° , find \text { (a) } I_{a A}, I_{b B}, \text { and } I_{c C} \text { (b) } V_{A N} (c) the average power and complex power absorbed by each load Zp.

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