List the $$last name$$ and the $$user id$$ for all persons whose last name starts

with $$J$.$ The user id consists of the first letter of the first name and the first

seven letters of the last name, all in lower case. Alias the user id $$User ID$,$

and sort the results in descending $$User ID$$ order. Use either LEFT$()$ or

SUBSTRING$()$ as you wish.