A) The following table gives the cumulative frequency distribution of annual incomes (in

thousands of dollars) for a sample of 200 families selected from a city.

Income ($1000's) f

10 to less than 25 24

10 to less than 40 85

10 to less than 55 149

10 to less than 70 172

10 to less than 85 186

10 to less than 100 200

i). The cumulative relative frequency of the fourth class, rounded to three decimal places, is:

ii). The percentage of families with an income of less than $55,000 is:

iii). The percentage of families with an income of $70,000 or more is: