Impurities in batches of product of a chemical process reflect a serious problem. It is known that the proportion of impurities Y in a batch has the following density function. Complete parts (a) through (e) below. f(y) = 9(1-y), 0sy≤1, 0, elsewhere (a) Verify that the given function is a valid density function. Select the correct choice below and, if necessary, fill in the answer boxes within your choice. O A. The given function is a valid density function because O B. The given function is a valid density function because it is at least 0 everywhere. The given function is a valid density function because it is at least 0 everywhere and because 19(1-1)² 0 O C. $9(1-y)ºdy= J 9(1-y)Ⓡdy = dy =

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