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