Append the number 9 to the list

my_list = [1, 2, 3, 4, 5]

To append the number 9 to the list my_list, you can use the append() method.

Here’s how you can do it:

my_list.append(9)

After this operation, my_list will be [1, 2, 3, 4, 5, 9] with 9 added as the last element.

Remove the element 4 from the list

To remove the element 4 from the list my_list, you can use the remove() method.

Here’s how you can do it:

my_list.remove(4)

After this operation, my_list will be [1, 2, 3, 5, 6] with 4 removed from the list.

Replace the second element with 11.

To replace the second element (index 1) with the value 11 in the list my_list, you can simply assign the new value to that index.

Here’s how you can do it:

my_list[1] = 11

After this operation, my_list will be [1, 11, 3, 5, 6] with the second element replaced by 11.