The tables show the number of chin-ups done by students in two different gym classes. 2nd Period 3 4 12 14 7 7 8 4 8 3 11 10 9 8 10 4 8 7 13 9 4th Period 10 3 14 14 16 15 7 12 7 10 12 8 10 9 6 11 9 1 2 5 Use a graphing calculator to construct a histogram for the number of chin-ups done by students in the 4th period. Describe the shape of the distribution.