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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 sun_declination(day):
 """Compute the declination angle of the sun for the given date. Uses the Spencer Formula (found at http://www.illustratingshadows.com/www-formulae-collection.pdf) :param day: The datetime.date to compute the declination angle for :returns: The angle, in degrees, of the angle of declination """

    day_of_year = day.toordinal() - date(day.year, 1, 1).toordinal()
    day_angle = 2 * pi * day_of_year / 365
    declination_radians = sum([
        0.006918,
        0.001480*sin(3*day_angle),
        0.070257*sin(day_angle),
        0.000907*sin(2*day_angle),
        -0.399912*cos(day_angle),
        -0.006758*cos(2*day_angle),
        -0.002697*cos(3*day_angle),
    ])

    return degrees(declination_radians)