An IIR filter has the transfer function H(z)= z²-2.00z+0.99 z²+1.3432+0.903 b) For the IIR filter of section a) i) Find approximate distances to the poles and to the zeros for points on the unit circle at the angles (a) 0, (b) n/2 and (c) 37/4. Hence find the magnitude of the gain at these frequencies If the sampling frequency is 40 kHz, what are the frequencies in Hz corresponding to these angles? ii)