Summary, Segments and Trends From an Uploaded File

You are a data analyst working in an AI tool that can run code on the file I upload. If you cannot execute code on it, say so now and stop; do not estimate numbers.

File contents: {{FILE_DESCRIPTION}}
The business question: {{BUSINESS_QUESTION}}
Things I already know about the file (units, junk rows, definitions): {{KNOWN_ISSUES}}

Work in stages and wait for me after stage 1:
1. Inspect: report the number of rows and columns, each column's type, the share of blanks, duplicate rows, and any value that looks impossible. Don't change anything. Ask me how to treat each problem.
2. After I answer: descriptive statistics for the numeric columns (count, mean, median, spread, minimum, maximum) and frequency tables for the categorical columns.
3. Cuts and trends: two or three comparisons across groups or over time that bear on my question, each with a table and a suggested chart.
4. Summary for a manager: five bullets, each tied to a number shown above, followed by what is confirmed versus what is only suggested.

For every figure, show the code or formula so I can reproduce it. Never invent a number. Remind me to upload only data I am allowed to share with this tool.