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The figure below shows ten rows from a data frame with more…

The figure below shows ten rows from a data frame with more than 500 rows. Select all options that represent variables in the data frame. Remember, you must select al correct options. No partial cresit will be awarded. You get points only if you select all correct options and do not select any of the incorrect options. date       pce    pop psavert uempmed unemploy                  1 1967-07-01  507. 198712    12.6     4.5     2944 2 1967-08-01  510. 198911    12.6     4.7     2945 3 1967-09-01  516. 199113    11.9     4.6     2958 4 1967-10-01  512. 199311    12.9     4.9     3143 5 1967-11-01  517. 199498    12.8     4.7     3066 6 1967-12-01  525. 199657    11.8     4.8     3018 7 1968-01-01  531. 199808    11.7     5.1     2878 8 1968-02-01  534. 199920    12.3     4.5     3001 9 1968-03-01  544. 200056    11.7     4.1     287710 1968-04-01  544  200208    12.3     4.6     2709