Which best describes the spread of a set of data that has an interquartile range of 14 and a mean absolute deviation of 6?

a.
the average distance of all data values from the mean is 10 and the middle 50% of data values has a range of 8.

b.
the average distance of all data values from the mean is 10 and the middle 50% of data values has a range of 20.

c.
the average distance of all data values from the mean is 6 and the middle 50% of data values has a range of 14.

d.
the average distance of all data values from the mean is 14 and the middle 50% of data values has a range of 6.