The following table shows analyst sentiment ratings for the 30 stocks listed in the Dow Jones Industrial Average. 
a.Construct a frequency distribution,relative frequency distribution,cumulative frequency distribution and relative cumulative frequency distribution using classes of 2 up to 4,4 up to 6,6 up to 8,and 8 up to 10.
b.Construct a histogram that summarizes the data.
c.What percentage of the stocks in the Dow Jones Industrial Average received a sentiment rating less than 8?
d.What percentage of the stocks in the Dow Jones Industrial Average received a sentiment rating of 6 or more?
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