add task solution

[IvanovvvIhor]

- [DEMO LINK](https://<IvanovvvIhor>.github.io/js_get_data_DOM/)

[mateacademy-ai-mentor]

Review Summary

Excellent work on this task! I am approving your solution as it correctly implements all the requirements. The code successfully parses the data, calculates the total and average population, and updates the page with the formatted numbers. The implementation is clean and easy to follow.

For future reference, you could consider using the Array.prototype.reduce() method to calculate the sum. It's a more modern and concise approach, but your current for loop is perfectly correct and works well. Keep up the great work!

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