The following is a stem-and-leaf display representing the amount of gasoline purchased, in gallons (with leaves in tenths of gallons), for a sample of 25 cars that use a particular service station on the New Jersey Turnpike:

a. Construct an ordered array.
b. Which of these two displays seems to provide more information? Discuss.
c. What amount of gasoline (in gallons) is most likely to be purchased?
d. Is there a concentration of the purchase amounts in the center of the distribution?