For the degree n of the filter we have 3 ≤ n ≤ 4
Filter having degree n = 4 ===================================================== Poles of Filter: p1 = (-0.3565065,0.92430045) p2 = (-0.86114395,0.38265278) p3 = (-0.86114395,-0.38265278) p4 = (-0.3565065,-0.92430045)
Filter having degree n = 3 ===================================================== Poles of Filter: p1 = (-0.22924472,0.88195078) p2 = -0.45848945 p3 = (-0.22924472,-0.88195078)