2-1. Given the following set of n = 35 observations:

10 19 18 21 20 20 18 18 18 16 11 12 16 12 18 19 19 13 15 17 17 16 17 14 15 14 18 19 16 14 15 19 17 17 18 construct an absolute frequency distribution, the relative frequency distribution, and the less than or equal to cumulative frequency distribution.