For Exercises 14-16, determine the (a) mean, (b) median, and (c) mode. 14. The following is the number of oil changes for the last 7 days at the Jiffy Lube located at the corner of Elm Street and Pennsylvania Avenue. 41 15 39 54 31 15 33 15. The following is the percent change in net income from last year to this year for a sample of 12 construction companies in Denver. 5 1 -10 -6512 7 8 6 5 -1 11 16. The following are the ages of the 10 people in the Java Coffee Shop at the Southwyck Shopping Mall at 10 a.m. 21 41 20 23 24 33 37 42 23 29