Design a lowpass analog Chebyshev-I filter with the following characteristics:
• A passband ripple of 0.5 dB,
• passband cutoff frequency of 4 kHz, and
• stopband attenuation of 45 dB or greater beyond 20 kHz.
Determine the system function in a cascade form. Plot the magnitude response, the log-magnitude response in dB, the phase response, and the impulse response of the filter.