need help with this question

The histogram to the right represents the weights (in pounds) of members of a certain high-school rogramming team. What is the ciass width? What are the approximate lower and upper class limits of the first class? What is the class width? The class width in (Simplify your answer.) What are the approximate lower and upper class limits of the first class? The approximate lower class limit is The approximate upper class limit is (Simplaty your answers.)