Ialready know the answer but i need someone to explain to me how to get the answer. you get 50 points

in a survey, 26 voters were asked their ages. the results are shown below. given a lower class limit of 20 and a class width of 10, which histogram correctly represents the data?

43 56 28 63 67 66 52 48 37 51 40 60 62 66 45 21 35 49 32 53 61 53 69 31 48 59

(see attachments for answers)