2.Consider the set of rights {read, write, execute, append, list, modify, own}. a. Using the syntax in Section 2.3, write a command delete_all_rights (p, q, s). This command causes p to delete all rights the subject q has over an object s. b. Modify your command so that the deletion can occur only if p has modify rights over s. c. Modify your command so that the deletion can occur only if p has modify rights over s and q does not have own rights over s