$153

$156 $159 $162 $163 $165 $166

$170 $170 $176 $177 $181 $185

$185 $186 $186 $189 $190 $192

$196 $203 $204 $219 $254 $286

a. What is the frequency associated with the SECOND class?

b. What is the frequency associated with the FOURTH class? 

c. What is the relative frequency associated with the SECOND class?

d. What is the relative frequency associated with the FOURTH class?

e. What is the cumulative frequency associated with the FOURTH class?