For the CE voltage-divider configuration, calculate the input impedance. A B D 533 02 757 Ω 949 Ω 1112 Ω Vi O CB R1 R2 VCC Ro RE Q1 Co CE Vcc = 18 V Beta 120 Vo 0 R1 = 47 kohms R2 = 12 kohms Rc = 2.2 kohms RE=1 kohms

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