Describe the characteristic of practical filters and their important parameters.

• What is the frequency domain?• Describe the characteristic of practical filters and their important parameters.• What is an equalizer? • Describe its function and how it works. • Describe the Amplitude Modulation in the time-domain and in the frequency. Use figures and bloc diagrams if necessary. This is at the emitter. • Describe what is happening at the receiver that is the demodulation. Again, show the equations and illustrate with figures and bloc diagrams. Show the demodulation in the frequency domain. Show all the blocs in the demodulation in the frequency domain. Describe a simple electronic circuit used to demodulate the received signal.