A teacher has 10 students in her class. She collected the finishing time (in minutes) of the mathematics test for all students: 20 24 22 32 23 25 37 26 40 35 (a) Find the 25th percentile and 75th percentile of the data. (b) Find the median of the data. (c) Find the range and interquartile range of the data (d) Comment on the skewness of the data with a reason.

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