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The circuit shown in the figure is used to provide regulated voltage (5V) across the 
resistor. Assume that the Zener diode has a constant reverse breakdown voltage for a current range, starting from a minimum required Zener current, 
its maximum allowable current. The input voltage
may vary by 5% from its nominal value of 6V. The resistance of the diode in the breakdown region is negligible.
The value of R and the minimum required power dissipation rating of the diode, respectively, are
and 10mW
and 40mW
and 10Mw
and 10mW
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