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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 set_viewbox(self, x, y, w, h):
 """Sets the origin and size of the viewbox, describing a virtual view area. Args: x (int):
 x coordinate of the viewbox origin y (int):
 y coordinate of the viewbox origin w (int):
 width of the viewbox h (int):
 height of the viewbox """

        self.attributes['viewBox'] = "%s %s %s %s" % (x, y, w, h)
        self.attributes['preserveAspectRatio'] = 'none'