Go to the St. Louis Federal Reserve FRED database and find data on the percent of value of loans secured by collateral for all commercial and industrial loans (ESANQ) and the net percentage of domestic banks tightening standards for commercial and industrial loans to large and middle-market firms (DRTSCILM). Download the data into a spreadsheet. a. Calculate the average, over the most recent four quarters and the four quarters prior to that, for the bank standards indicator and the percent of loans secured by collateral indicator. Do these averages behave as you would expect ? b. Use the Data Analysis tool in Excel to calculate the correlation coefficient for the two data series from 1997 :Q3 to the most recent quarter of data available. What can you conclude about the relationship