Please answer both multiple choice questions

QUESTION If a Biba security mocel is implemented in an Operating System to protect the kernel level device drivers, then applicaticns (trom user level) can't access these device drivers applications (from user level) can access these device drivers bu: not change them kernel level processes can't read the application level processes kernel level processes can access services prcvided by application (user) level processes QUESTION 2 A vulnerability in software or operatng system can result in an attack at any time is an attack already is a threat due to an exploit will result in an atack soon