t;&gt; h = fir1(25,0.4);               # Window-based FIR filter design
    &gt;&gt;&gt; flag_linphase = islinphase(h)   # Determines if filter is linear phase
    &gt;&gt;&gt; hmin = polystab(h) * norm(h)/norm(polystab(h));
    &gt;&gt;&gt; flag_minphase = isminphase(hmin)# Determines if filter is min phase

    &#34;&#34;&#34;
    v = np.roots(a)
    i = np.where(v != 0)
    vs = 0.5 * (np.sign(np.abs(v[i]) - 1) + 1)
    v[i] = (1 - vs) * v[i] + vs / np.conj(v[i])
    ind = np.where(a != 0)
    b = a[ind[