Design a lowpass FIR filter with the following specifications: Design method: Parks-McClellan algorithm (Optimal Method) Sampling rate = 1,000 Hz Passband 0-200 Hz Stopband = 300 - 500 Hz Passband ripple = 1 dB Stopband attenuation = 40 dB a) Parm Meelchau argertum ptimal vretnos), b) Determine the number of filter coefficients, N, c) Work out the band edges in a form suitable for the Optimal method. d) Plot the Magnitude response vs Frequency and the Phase vs Frequency. [10 marks Parks- [4 marks [4 marks [6 mark= [6 mark