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Fifty patients in a city hospital were surveyed and the following data show their ages. Construct a complete frequency distribution of the ages consisting of 9 classes.

54 62 71 8 18 35 61 45 38 80
47 58 65 19 53 28 19 33 41 29
30 32 44 55 56 75 82 39 34 66
17 43 31 47 64 7 76 60 10 27
26 83 92 35 58 62 78 43 31 19

(the numbers ^^^)