Which of the following is typically found in the database metadata?

Employee names $($e$.$g$.$ Joe, Bob, Lisa$)$

Data types $($e$.$g$.$ Integer, Date, Character$)$

Student grades $($e$.$g$.$ A$,$ A$-,$ B$+)$

Product prices $($e$.$g$.$ $$10,$ $$15,$ $$20)$

Customer ages $($e$.$g$.25,40,53)$