LAW QUERIES.......not so urgent

Query 1: Can a minor be appointed as a director in public company / pure private company ?

Query 2 : Can a manager and MD co-exist simultaneously in a pure private company ?

Query 3 : Can a company issue unsecured debentures ? if yes, how ?

Query 4 : Do executive director comes into the ambit of "managerial person" for determining managerial remuneration ?

Answers with relevant provisions and case laws will be appreciated.

thanks in advance.