For the circuit a) calculate the DC polarization currents and voltages, to produce an output voltage (aprox.) in half of the value of the supply voltage DC, b) the input and output AC impedances, c) the voltaje and current gains. RB 3 ΜΩ w 21 o Vcc (+21 V) RC ic 7502 182 22 Ic₂ B₁ = 140 B₂ = 180