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 220 - 234 1 235 - 249 16 250 - 264 71 265 - 279 108 280 - 294 83 295 - 309 18 310 - 324 3 What is the class midpoint for the fourth class?