1. Each recursive call steps forward into a location that has not previously been visited. Therefore, the number of calls can be no more than the number of locations in the maze, which is 200. 2. The...

1. Each recursive call steps forward into a location that has not previously been visited. Therefore, the number of calls can be no more than the number of locations in the maze, which is 200.

2. The method’s implementation is:

A good variant expression is “the number of digits in n,” with the threshold of 1.