Construct a histogram, frequency polygon, and ogive, using relative frequencies for the data in Exercise 6 of this section.

Class limits                    Frequency
39.9–42.8........................................2
42.9–45.8........................................2
45.9–48.8........................................5
48.9–51.8........................................5
51.9–54.8......................................12
54.9–57.8........................................5
..............................................Total 31