Advanced Grade System (Need Help)

Scenario: A school uses a detailed grading system that adjusts a student's grade based on participation and assignments completed, along with the test scores:

The base grade is calculated from the test score: A (90-100), B (80-89), C (70-79), D (60-69), F (below 60).
If a student's participation is in the top 10%, add one grade level to their base grade (B becomes A).
If fewer than 70% of assignments are completed, drop one grade level from their base grade (B becomes C).
Task: Write a Python script that inputs the student's test score, participation percentile, and assignment completion rate (percentage), then calculates and prints the final grade

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