The file P18_07.txt lists monthly values of the consumer price index (CPI). Import this data into Excel, excluding the rows before the actual data. (Many text files have information in the first few lines that doesn't import nicely.) Then rearrange the data as was done in the previous section so that there are only two columns: Month (such as Jun-1954) and CPI. You can delete the columns to the right of the December column. Save the results as an Excel (.xlsx) file?