Final answer:
A possible heuristic function for the given problem is to count the number of discs that are not in their final position. This heuristic is admissible and consistent.
Step-by-step explanation:
One possible heuristic function for the given problem is to count the number of discs that are not in their final position. This heuristic is admissible because it never overestimates the number of moves required to solve the problem, since each move can only result in one disc being moved closer to its final position. This heuristic is also consistent because if a disc needs to be moved multiple times to reach its final position, the heuristic value will gradually decrease as the disc gets closer to its final position.