Design an audio amplifier that amplifies signals from \(20 \mathrm{~Hz}\) to \(20 \mathrm{kHz}\). Your approach should be to use a cascade connection of two first-order passive circuits separated by a noninverting OP AMP. The source has a \(50-\mathrm{k} \Omega\) series resistor and the output of the filter feeds a \(10-\mathrm{k} \Omega\) audio transducer. Design a bandpass circuit with the following specifications all \(\pm 5 \%: f_{\mathrm{CL}}=\) \(20 \mathrm{~Hz}, f_{\mathrm{CH}}=20 \mathrm{kHz}, B=19,980 \mathrm{~Hz}\). Passband gain \(+40 \mathrm{~dB}\). What is the minimum \(G B\) of the OP AMP that can be used in this application? Use Multisim to validate your results.