program1.pyThis program requires the main function and a custom value-returning function. Use f-strings to output variables.In the main function, code these basic steps in this sequence:- Use a list comprehension to generate 100 random integers, all from 1 to 100 (inclusive). These represent the ages of a population of 100 people.- Pass the list as the sole argument to the custom value-returning function.In the custom function:- Sort the list in descending order using methods described in Chapte

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