$25.$ what does the following SQL statement return?

SELECT CHARINDEX$(\text{'}$@$\text{'},$ 'firstname.lastname@targetedtec.com'$)$

$*$

$40$ points

A number which shows the position of the $\text{'}$@$\text{'}$ symbol in the email address.

None of the above.

Domain name of email address.

First name of the student.