A data set with whole numbers has a low value of20and a high value of82. (For each answer, enter an exact number.) Find the class width for a frequency table with seven classes. Find the class limits for a frequency table with seven classes.

	Lower class limitUpper class limit
First class	lower class limit upper class limit
Second class	lower class limit upper class limit
Third class	lower class limit upper class limit
Fourth class	lower class limit upper class limit
Fifth class	lower class limit upper class limit
Sixth class	lower class limit upper class limit
Seventh class	lower class limit upper class limit