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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 layers_intersect(layer_a, layer_b):
 """Check if extents of two layers intersect. :param layer_a: One of the two layers to test overlapping :type layer_a: QgsMapLayer :param layer_b: The second of the two layers to test overlapping :type layer_b: QgsMapLayer :returns: true if the layers intersect, false if they are disjoint :rtype: boolean """

    extent_a = layer_a.extent()
    extent_b = layer_b.extent()
    if layer_a.crs() != layer_b.crs():
        coord_transform = QgsCoordinateTransform(
            layer_a.crs(), layer_b.crs(), QgsProject.instance())
        extent_b = (coord_transform.transform(
            extent_b, QgsCoordinateTransform.ReverseTransform))
    return extent_a.intersects(extent_b)