Design a lowpass FIR filter with the following specifications: Design method: Parks-McClellan algorithm Sampling rate: 8000 Hz Passband: 0 – 1200 Hz Stopband 1500 – 4000 Hz Passband ripple: 1 dB...

Design a lowpass FIR filter with the following specifications:

Design method: Parks-McClellan algorithm

Sampling rate: 8000 Hz

Passband: 0 – 1200 Hz

Stopband 1500 – 4000 Hz

Passband ripple: 1 dB

Stopband attenuation: 40 dB

List the filter coefficients and plot the frequency responses.