def join_map_below(map1, map2): Given two maps, create andreturn a new map by deep-copying map1 and map2 one above the otherfor a taller map of the same width. If their widths don’t match,return None.
• Assume: map1 and map2 are maps as defined above. Remember, youmust not modify the original maps.
• join_map_below([[1,1],[2,2]], [[3,3],[4,4]]) →[[1,1],[2,2],[3,3],[4,4]]
• join_map_below([[1]], [[2]]) →[[1],[2]]
• join_map_below([[1,2],[3,4]], [[5,6,7,8]]) → None
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