In exercises 6 and 7, use the given measure to find the missing value in each data set. 6. the mean of the ages of 5 brothers is 13 years. 12, 14, 8 7. 7. the median number of students in each music class is 19 people. 24, 17, 20, 21 8. write a data set where both the mean and the median describe the data equally well. explain your reasoning. show all work