The S&P $500$ is a stock index based on the market capitalizations of large companies that are publicly traded on the NYSE or NASDAQ. The CSV file sp$500.$csv contains data from February $1,2018$ about the stocks that comprise the S&P $500.$ We will investigate the first digit distributions of the variables in this data set.

Read in the S&P $500$ data. What is the unit of observation in this data set? Is there a variable that is natural to use as the index? If so$,$ set that variable to be the index. Once you are done, display the DataFrame.