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the following frequency distribution analyzes the scores on a math test. find the class boundaries of scores interval 40-59

scores| number of students
40-59| 2
60-75| 4
76-82| 6
83-94| 15
95-99| 5

39.5, 59.5
39.5, 58.5
40.5, 58.5
40.5, 59.5 (i think its this one)