python code please, do not copy other answer on chegg

3a) Write a function that rounds a floating point input x to the nearest value in an array a : def my_round (x, a): round a number to the nearest element of an array of ordered values Args: x: input numeric value a: ordered array of representable numerical values Returns: element of a closest to x # YOUR CODE HERE raise Not ImplementedError() return x_bar assert_equal (my_round (17, x), 16) assert_equal (my_round (19, x), 20)