Determine the range of values of Vi that will maintain the Zener diode of Fig Q2(b) in the “on”state. Here, X = 28

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IR R 220 2 Vz = X V Izy = 60 mA 1.2 k Vi Vi Fig. Q2(b) + IR R 220 2 Vz = X V Izy = 60 mA 1.2 k Vi Vi Fig. Q2(b) +