Construct a stem and leaf diagram, a frequency histogram, and a relative frequency histogram for the following data set. For the histograms use classes 6.0–6.9, 7.0–7.9, and so on. 8.5 8.2 7.0 7.0 4.9 6.5 8.2 7.6 1.5 9.3 9.6 8.5 8.8 8.5 8.7 8.0 7.7 2.9 9.2 6.9