Geometry

Question Analysis:
This question requires reversing a sequence of geometric transformations — two reflections and one translation — to find the original pre-image.  
The main focus is on applying inverse operations in reverse order, especially with reflection across the diagonal line .

Key Concept Explanation:
- Reflection over : swaps coordinates:  
- Translation by vector : adds values to coordinates:  
- Reversing transformations requires applying each step in the opposite order using the inverse operation.

Step-by-Step Solution:
Given final image:  

Step 1 — Undo final reflection over :  
Swap coordinates:  

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