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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def radar_xsect(scatterer, h_pol=True):
 """Radar cross section for the current setup. Args: scatterer: a Scatterer instance. h_pol: If True (default), use horizontal polarization. If False, use vertical polarization. Returns: The radar cross section. """

    Z = scatterer.get_Z()
    if h_pol:
        return 2 * np.pi * \
            (Z[0,0] - Z[0,1] - Z[1,0] + Z[1,1])
    else:
        return 2 * np.pi * \
            (Z[0,0] + Z[0,1] + Z[1,0] + Z[1,1])