A consumer group conducted a study regarding the number of hours of TV that teen

A consumer group conducted a study regarding the number of hours of TV that teenagers watched per week. The cumulative frequencies of the sample were as follows.Hours per week Cumulative Frequency0-4 75-9 2510-14 4915-19 7720-24 120What is the mean weekly hours of TV watched for the sample?a.) .38b.) 12c.) 15.42d.) 17e.) 370I know the answer is 15.42 please explain in detail how you got the answer.