In which of the following cases would it make the most sense to use a b$-$tree index?

SELECT $*$

FROM employee

WHERE title LIKE $\text{'}\%$IT$\%\text{'}$;

SELECT $*$

FROM invoice

WHERE invoice$\_$id $>10$ AND invoice$\_$id $<200$;

SELECT $*$

FROM customer

WHERE email LIKE $\text{'}\%$gmail$\%\text{'}$;

SELECT $*$

FROM customer

WHERE fax LIKE $\text{'}\%7070\text{'}$;