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. mi: Number of Hours Frequency 1.05.9 21 6.0 10.9 35 11.015.9 42 16.020.9 28 21.025.9 24 26.030.9 20 31.035.9 11 36.040.9 41 1345.!) 2 46.050.9 12 (a) How many classes are there? There are [3 classes. (b) What is the class width? The class width is D. Do not round. ((2) What percentage of students play video games for less than 36 hr per week? D% of the students play video games for less than 36 hr per week. (d) What percentage of students play video games for 31 or more hours per week? D % of the students play video games for 31 or more hours per week