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mean, median, first quartile, and third quartile

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Can anybody help me towards this one problem. It was thought to me differnt then it appears in the book. I was thought throught a lot of steps that is hard to remember, and then the books define them as short steps. I am soo confuse because the mean, range..... you follow different steps and is not like it was before because in this one you have to use ranks.

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The expert computes the mean, median, first quartile, and third quartile.

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A. Compute the mean, median, first quartile, and third quartile.

Solution:

Mean = (36.15 + 31.00 + 35.05 + 40.25 + 33.75 + 43.00)/6 = 36.53 (rounded to two places)

For finding median arrange numbers in ascending order

31.00, 33.75, ...

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