Consider the following data, which are a sample of amino acid concentrations (mg/100ml) in arthropod hemolymph: 240.6, 238.2. 236.4, 244.8, 240.7, 241.3, and 237.9. (a) Calculate the first quartile (Q1), the third quartile (Q3), interquartile range, and semi- interquartile range. (b) Calculate the 20th and 60th percentiles.

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