add task solution

[Sofiia912]

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[mateacademy-ai-mentor]

Review Summary

I am approving your solution because it correctly implements all the required functionality in main.js and meets the core checklist items. You gather all .population elements, strip commas, convert them to numbers, accumulate the total, and compute the average based on the number of entries, which aligns with [CHECKLIST ITEM #1–#5]. You then update the .total-population and .average-population spans with the computed values and format both using toLocaleString() so they match the original thousands separators, covering [CHECKLIST ITEM #6–#9]. You’ve also respected the constraint to keep changes limited to main.js (and project docs), without modifying HTML or styles, satisfying the technical constraints.

There are no critical blockers: the logic is sound, selectors are correct, and the output matches the task description. As a minor, non-blocking improvement, you could add basic validation around parsing in case a .population span has unexpected text, and perhaps use a for...of loop or array methods for slightly clearer iteration. Overall, your implementation is solid and fulfills the requirements for this task—nice work.

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