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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 wgs84_to_utm(lng, lat, utm_crs=None):
 """ Convert WGS84 coordinates to UTM. If UTM CRS is not set it will be calculated automatically. :param lng: longitude in WGS84 system :type lng: float :param lat: latitude in WGS84 system :type lat: float :param utm_crs: UTM coordinate reference system enum constants :type utm_crs: constants.CRS or None :return: east, north coordinates in UTM system :rtype: float, float """

    if utm_crs is None:
        utm_crs = get_utm_crs(lng, lat)
    return transform_point((lng, lat), CRS.WGS84, utm_crs)