What is the class midpoint for the seventh class?

Data was collected for 300 fish from the North Atlantic. The length of the fish (in mm) is summarized in the GFDT below. Lengths (mm) Frequency 60 - 74 1 75 - 89 16 90 - 104 71 105 - 119 108 120 - 134 83 135 - 149 18 150 - 164 3 What is the class midpoint for the seventh class? class midpoint =