Calculate the 5 number summary and the interquartile range of the following data: 20, 36, 78, 18, 37, −33, 32, 44, 54, 28, 74, 12, 61, 47, 40, 4820, 36, 78, 18, 37, −33, 32, 44, 54, 28, 74, 12, 61, 47, 40, 48 Q1 =  Q2 =  Q3 =  Min =  Max =  IQR =

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