A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2,4,3,1,0,2,1,3,1,4,9,2,4,3,0 Second period: 3.2.3.1.3, 4.2, 4.3, 1.0.2, 3, 1.2 Third period: 4,5, 3, 4, 2, 3, 4, 1, 8, 2, 3, 1, 0, 2, 1, 3 Which is the best measure of center for second period and why?