Programming Languages Concepts.

Please show your work with clear and legible work.

5. (4 points) Consider a language for simplified email addresses. The address has three parts. The first part is an account name starting with a letter and continuing with any number of letters or digits. The second part is an @ character. The third part is a host with two or more sequences of letters or digits separated by periods; the last sequence must be a top-level domain either 'com', 'org', 'gov', or net'. Define a context-free grammar to model this language