Question 3: The circuit in Figure 2 shows a bipolar op-amp circuit. Here, the input differential-pair Q1-Q2 is loaded in a current mirror formed by Q3-Q4. The second stage is formed by the current-source-loaded common-emitter transistor Q5. An output stage is formed by the transistor Q6. The capacitor Cc is placed in the negative feedback path of Q5 and thus is Miller-multiplied by the gain of Q5. The resulting large capacitance forms a dominant high-frequency pole. \text { All the transistors have } \beta=120,\left|V_{k E}\right|=0.7 V_{,} r_{\alpha e}=\infty \text {. } a) For inputs grounded and output held at 0V (by negative feedback, not shown),find the emitter currents of all transistors. \text { b) Calculate the gain of the amplifier with } R_{L}=20 \mathrm{k} \Omega \text {. } \text { c) With } R_{L}=20 \mathrm{ka} \text {, find the value of Cc to obtain a } 3 \text {-dB frequency of } 200 H z \text {. }