A sample of 200 college freshmen was asked how many hours per week they spent playing video games. The following frequency distribution presents the results. Number of Hours Frequency 1.03.9 20 4.06.9 31 7.09.9 43 10.012.9 25 13.015.9 23 16.018.9 19 19.021.9 10 22.024.9 25.0219 4 28.030.9 16 (a) How many classes are there? There are D classes. (b) What is the class width? The class width is D. (a) How.' many classes are there? There are D classes. {b} What is the class width? The class width is I] . Do not round. (c) 1What percentage of students play video games for less than 19 hr per week? D56 of the students play video games for less than 19 hr per week. {d} What percentage of students play video games for 16 or more hours per week? D % of the students play video games for 16 or more hours per week