algorithm. The following specifications are given: Passband frequency: 0.20 ? Stopband frequency: 0.35 ? Passband ripple: Rp 0.40 Stopband Attenuation: As-50 (a) (3 points) Give a brief description of an equiripple FIR filter and the associated opti mization criterion used in the Parks-McClellan algorithm (b) (3 points) For the given low-pass filter specification, make a first estimate of the order of the filter algorithm. The following specifications are given: Passband frequency: 0.20 ? Stopband frequency: 0.35 ? Passband ripple: Rp 0.40 Stopband Attenuation: As-50 (a) (3 points) Give a brief description of an equiripple FIR filter and the associated opti mization criterion used in the Parks-McClellan algorithm (b) (3 points) For the given low-pass filter specification, make a first estimate of the order of the filter