In this Zener diode regulator, the source voltage varies from 6 V to 11 V. Assume that the load current varies between 2 mA and 48 mA, and that the diode is an ideal 4 V Zener diode. What is the largest allowable resistance that will ensure the load voltage remains constant with variations in load current and source voltage? Please enter your answer to 3 significant figures.

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