Challenge: Your First ABC

You are building the foundation of a reporting system. Your task is to define an abstract base class that enforces a consistent interface across all report types.

1. Import ABC and abstractmethod from the abc module.
2. Define an abstract class BaseReport(ABC) with two abstract methods:
   • generate(self, data) – produces and returns the report content as a string;
   • get_format(self) – returns the report format name as a string (e.g. "CSV", "JSON").
3. Define a concrete class CsvReport(BaseReport) that:
   • implements generate(self, data) – data is a list of dicts; returns a CSV string where the first line is the comma-joined keys of the first dict, and the second line is the comma-joined values of the first dict (convert each value to str);
   • implements get_format(self) that returns "CSV".
4. Create an instance of CsvReport called csv_report.
5. Store the result of csv_report.get_format() in a variable called report_format.
6. Store the result of csv_report.generate([{"id": "R-001", "amount": "4500.0", "status": "approved"}]) in a variable called report_output.
7. Print report_format and report_output.