A differential amplifier circuit is shown below, where the Op amp is TL081, R1=1kW and Rf=10kW. The bode plot (gain curve) is provided (the straight line is the gain curve). According to the TL081 datasheet, the input noise voltage and current of TL08 are 25 nV/Hz and 0.01 pA/Hz, respectively. Assuming the circuit operates under room temperature, please find:

1) the output voltage Vout;

2) the GBP (gain-bandwidth product) of the Op amp;

3) the bandwidth of the differential amplifier; and

4) the noise voltage at the output of the differential amplifier.

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