Difficulty: Easy
Correct Answer: East and South
Explanation:
Introduction / Context:
We need final facings for two independent walkers after identical turn patterns.
Given Data / Assumptions:
Concept / Approach:
Apply turns relative to each traveller's current heading.
Step-by-Step Solution:
Verification / Alternative check:
Two lefts rotate 180° from the original heading.
Why Other Options Are Wrong:
They mismatch at least one traveller's final orientation.
Common Pitfalls:
Assuming both end with the same facing; they start perpendicularly, so final facings differ.
Final Answer:
East and South
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