Concerning the data represented in the following boxplot, which one of the following statements is true?

I. The mean is greater than the median.

ii. The mean is less than the median.

iii. The mean is approximately equal to the median.

True or false: In any boxplot,

a. The length of the whiskers is equal to 1.5 IQR, where IQR is the interquartile range.

b. The length of the whiskers may be greater than 1.5 IQR, where IQR is the interquartile range.

c. The length of the whiskers may be less than 1.5 IQR, where IQR is the interquartile range.

d. The values at the ends of the whiskers are always values in the data set used to construct the boxplot.