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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 aer2ned(az: float, elev: float, slantRange: float, deg: bool = True) -> Tuple[float, float, float]: """ converts azimuth, elevation, range to target from observer to North, East, Down Parameters az : float or numpy.ndarray of float azimuth elev : float or numpy.ndarray of float elevation slantRange : float or numpy.ndarray of float slant range [meters] deg : bool, optional degrees input/output (False: radians in/out) Results ------- n : float or numpy.ndarray of float North NED coordinate (meters) e : float or numpy.ndarray of float East NED coordinate (meters) d : float or numpy.ndarray of float Down NED coordinate (meters) """

    e, n, u = aer2enu(az, elev, slantRange, deg=deg)

    return n, e, -u