For this exercise, consider X "Amount paid to recharge a telephone company's prepaid card".

X N of recharge

[2.000 - 3.500[ 15

[3.500 - 5.000[ 18

[5.000 - 10.000[ 16

[10.000 - 12.500[ 12

[12.500 - 15.000[ 9

a) Complete the table with the remaining missing data.

b) Design a graph with the data from the table.

c) What percentage of people paid between $3,500 and $12,500?

d) Calculate and interpret the 8th decile and the 68th percentile.