monday_temperatures=(1,4,5) >>> monday_temperatures2=[1,4,5] >>> monday_temperatures2.append(7) >>> monday_temperatures2 [1, 4, 5, 7] >>> monday_temperatures2.remove(4) >>> monday_temperatures2 [1, 5, 7] >>> monday_temperatures.append(7) Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'tuple' object has no attribute 'append'