A set of dato contains 70 observations. The lowest volue is 42 and the largest is 148 . The dato are to be organized into a frequency distribution. a. How many classes would you suggest? b. What would you suggest as the lower limit of the first class? A set of dato contains 70 observations. The lowest volue is 42 and the largest is 148 . The dato are to be organized into a frequency distribution. a. How many classes would you suggest? b. What would you suggest as the lower limit of the first class