def join_map_side(map1, map2): Given two maps, create and return a new map by deep-copying map1 and map2 side by side for a longer map of the same height. If their heights don't match, return None. Assume: map1 and map2 are maps as defined above. Remember, you must not modify the original maps. join_map_side([[1,2],[5,6]], [[3,4],[7,8]]) [[1,2,3,4],[5,6,7,8]] join_map_side([[1],[2],[3],[4]], [[5],[6],[7],[8]]) [[1,5],[2,6],[3,7],[4,8]] join_map_side(m1,m2) None