Figure 12.12 shows only part of the decision tree for the first two levels. How many entries are there at the second level of the full tree? How many are at level 3 of the full tree?

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empty col l row 2 col I col | col l col l col l col l col I row | row 3 row 4 row 5 row 6 row 7 row 8 col 2 col 2 col 2 col 2 col 2 col 2 col 2 col 2 row | row 2 row 3 row 4 row 5 row 6 row 7 row 8