7. The diagram below represents an associative memory as described in the text. What stable state will the system reach if it is initiated with the top and bottom neurons excited and the others inhibited?

8. The diagram below represents an associative memory as described in the text. What stable state will the system reach if it is initiated with the top and left-most neurons excited and the others inhibited?

9. How many nodes would be in the search tree generated by a heuristic search when solving the eight-puzzle from the starting configuration below if the-number-of-tiles-out-of-place were used as the heuristic?

1 2

4 5 3

7 8 6

ANSWER: 7 or 8 (depending on whether the student counts both of the final options or stops with only the goal)

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