Final answer:
This question relates to querying a database to generate a sorted list of customers with last names beginning with 'M'. The process involves using an SQL command to select and order the results appropriately.
Step-by-step explanation:
The student is asking for assistance with generating a list of customers whose last name begins with the letter 'm'. This task typically requires database querying skills, likely suggesting a SQL query or a similar command in another data manipulation language. The student is also requesting that the output be sorted in descending order by last name.
Example SQL Query
To accomplish this, one could use the following SQL command:
SELECT first_name, last_name FROM customers WHERE last_name LIKE 'M%' ORDER BY last_name DESC;
This SQL query would generate a list of customers with first and last names where the last name starts with 'M', sorted in descending alphabetical order by last name.