The function f2 (my_list) gets a list my_list and returns new list in which each element is duplicated twice. Example : f2 ([-1,4,5]) == [-1,-1,4,4,5,5] f2 ([7]) == [7,7] Complete the following code for the function f2 : def f2 (my_list): return Requirements : Fill in the missing code ONLY in the designated place. Must NOT use recursion. Python