An email address identifies an email box to which messages are delivered. Every email address consists of 3 elements: local-part, @ symbol (pronounced as "at"), and domain name. The local-part is placed before the @symbol, and the domain name is placed after the @symbol. For example, in the email johndoe@company.com, "johndoe" is the local-part, and "company.com" is the domain. Emails are invalid without these elements. The local-part or username contains: a. uppercase and lowercase Latin letters (A-Z, a-z); b. numeric values (from 0 to 9 ); c. special characters, such as \# ! $$&+/= ? _{} i. The period character (.) is valid for the local-part unless it is placed at the beginning or end of an email address. There also can't be two or more periods in a row A domain name consists of one or more parts separated by a dot and can contain: a. uppercase and lowercase Latin letters (A-Z, a-z); b. numeric values (from 0 to 9 ); c. a hyphen (-), on condition that it is not placed at the beginning or end of the domain 1. (9 points) Create a regular expression, DFA, and Regular Grammar for the local-part of the email address. 2. (9 points) Create a regular expression, DFA, and Regular Grammar for the domain of the email address. 3. (2 points) Create a NFA for an email address