2-18. The California Golf Association recently conducted a survey of its members. Among other questions, the members were asked to indicate the number of 18-hole rounds that they played last year. Data for a sample of 294 members are provided in the data file called Golf Survey. a. Using the 2k n guideline, what is the minimum number of classes that should be used to display these data in a grouped data frequency distribution? b. Referring to part a, what should the class width be, assuming you round the width up to the nearest integer? c. Construct and interpret a frequency histogram for the data.