(Python 3.4) 8.12 Add to class Point methods up() , down() , left() , and right() that move the point object by 1 unit in the appropriate direction. The implementation of each should not modify instance variables x and y directly but rather indirectly by calling existing method move().

>>> a = Point(3, 4)

>>> a. left()

>>> a. get( )

(2, 4)