4. Write single Python statements (list comprehensions) that will ... a. Remove the last item in list A and insert it at the beginning of list B For example: if A = [1,2,3] and B = [4,5,6] before the statement then after the statement A will contain [1,2] and B will contain [3,4,5,6] b. Remove the first item in list A and insert it at the end of list B For example: If A = [1,2,3] and B = [4,5,6] before the statement then after the statement A will contain [2,3] and B will contain [4,5,6,1]