9.112 In the multistage amplifier of Fig. 9.38, emitter resistors are to be introduced: 100 Ω in the emitter lead of each of the first-stage transistors and 25 Ω for each of the second-stage transistors. What is the effect on input resistance, the voltage gain of the first stage, and the overall voltage gain? Use the bias values found in Example 9.7.