4. Fifty Patients were treated at the free clinic last week. Their ages are listed from youngest to oldest below. 14, 15, 15, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 19, 19,20, 20, 20, 21, 21, 21, 22, 22, 24, 24, 24, 25, 26, 26, 26, 27, 28, 30, 31, 32, 36, 40, 41, 41, 47, 52, 52, 59, 59, 60, 65, 72 a. What is the mean age? b. What is the median? C. What is the mode? d . What is the range? e. Calculate the variance of the ages listed from a frequency distribution