A pesky signal at \(45 \mathrm{kHz}\) is interfering with a desired signal at \(20 \mathrm{kHz}\). A careful analysis suggests that reducing the interfering signal by \(75 \mathrm{~dB}\) will eliminate the problem, provided the desired signal is not reduced by more than \(3 \mathrm{~dB}\). Design an active \(R C\) filter that meets these requirements. Verify your design using Multisim.