7.18 When the amplifier circuit of Fig. 7.6 is biased with a certain V BE, the dc voltage at the collector is found to be +2 V. For V CC = +5 V and RC = 1 k, 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.