The number of cell phones sold by a store on consecutive days of a month is shown below:

25, 13, 16, 34, 13, 31, 16, 34, 19, 22, 13, 28, 19, 16, 22, 16, 13, 16, 13, 16

Sam created the following incorrect dot plot to represent the data:


What should Sam do to make the dot plot correct?

Put another dot on 13
Put another dot on 16
Delete one dot on 22
Delete one dot on 34