7.18 When the amplifier circuit of Fig. 7.6 is biased with a certain VBE, the dc voltage at the collector is found to be +1V. For VCC = +3 V and RC = 2 kΩ, find IC and the small-signal voltage gain. For a change ∆vBE = +5 mV, calculate the resulting ∆vO. Calculate it two ways: by using the transistor exponential characteristic ∆iC, and approximately, using the small-signal voltage gain. Repeat for ∆vBE = −5 mV. Summarize your results in a table.