Hazardous waste:Following is a list of the number of hazardous waste sites in a sample of states of the United States in a recent year. The list has been sorted into numerical order.

9	11	12	12	12	13	14	14	15	15
16	19	20	21	25	26	29	30	32	32
32	38	40	48	49	49	52	67	86	97

Source: U.S. Environmental Protection Agency

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(a) Find the first and third quartiles of these data.

The first quartile of these data is . The third quartile of these data is .