Improve and Fix Issues in calculators

[smog-root]

Tasks:

• Review all model files for potential performance optimizations.
• Refactor code to improve readability and remove redundancies.
• Fix any existing bugs in the model logic or structure.
• Add comments and documentation for better understanding.
• Write unit tests to verify model accuracy and reliability.

Additional Context: Ensure all changes align with the repository’s coding standards and best practices. This update is intended to make the models more robust and efficient for current and future use.

You can add the level label after PR submission! @sampadatiwari30 @Sampadatiwari

[github-actions]

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[github-actions]

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