The following relative frequency ogive represents the height…

The fоllоwing relаtive frequency оgive represents the heights (in inches) of 30 lаwyers. а) What is the class width? How many classes are represented in the graph?   [4 points] b) What is the lower and upper of the last class?  [3 points] c) Estimate the percentage of lawyers who had a height of at least 71.4 in.  [3 points]