The data set below contains the number of partners in a cohort of rising accounting firms that have been tagged as "firms to watch." Complete parts (a) through (d) below. 15 27 15 26 11 11 23 14 27 32 20 33 20 23 11 15 18 22 15 21 31 17 34 25 15 14 14 17 33 30 27 20 31 30 a. Compute the mean, median, and the mode. The mean is. (Round to two decimal places as needed.)