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How to find the current and voltage of this circuit?

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I have this circuit with a Z-Diode in reverse.Find U2 and I2?

I solved the fist circuit.

  • U1 = 0.7V, I1 = (15V-0.7V)/1kΩ)= 14.3mA

The results for are U2-8.2V I2=6.8mA but I just can't figure out how to come to that

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