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The following data was used to make the claim that the rising use of cell phones is causing an increased number of traffic accidents in a city. Years Cell phones Sold Traffic Accidents (thousands) 1998 78 3765 1999 104 3802 2000 157 4038 2001 217 4104 2002 476 4298 a) Find the correlation coefficient for these data and classify the correlation between the sales of cell phones and the numbers of traffic accidents (either the Spearman's Rank Coefficient, or the PPMCC, but state which you are calculating. You are welcome to use a spreadsheet). b} Is it reasonable to conclude the rising use of cell phones is causing an increase in traffic accidents? Explain why or why not