A research studying the prevalence of alcohol use among seniors in a particular high school asked 45 of these youths how many drinks they gad consume in the last week. convert the following frequency distribution of response (number of drinks) into a grouped frequency distribution containing four class intervals, and (a) determine the size of the class intervals, (b) indicate the upper and lower limits of each class intervals, (c) identify the midpoint of each class intervals, (d) find the percentage for each class intervals, (e) find the commulative frequency of each class interval, and (f) find the cumulative percentage for each class intervals

Number of Drinks F

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7 5

6 9

5 6

4 11

3 4

2 3

1 3

0 4

N= 45