from typing import List


def convert_points(points: List[tuple]) -> tuple:
    """Return a tuple of two lists, containing the x- and y-coordinates of the given points.

    >>> result = convert_points([(0.0, 1.1), (2.2, 3.3), (4.4, 5.5)])
    >>> result[0]  # The x-coordinates
    [0.0, 2.2, 4.4]
    >>> result[1]  # The y-coordinates
    [1.1, 3.3, 5.5]
    """
    x_coordinates = [x[0] for x in points]
    y_coordinates = [x[1] for x in points]
    return (x_coordinates, y_coordinates)