3. Suppose the Chinese Wall Policy is enforced and all objects are unsanitized Bank Gasoline Open COI class source ShellMobil Citibank Bank of America GNU -CD object | | objects | lobject 3 ||object 4||object]bject |object |-Object (a) If Alice has already read objecti and object4, what objects can she read now? (5pt) (b) If Alice has read objecti, object4 and objects, what objects can she read now? (5pt) (c) Can you find a situation where Alice cannot read object,? Explain if your answer is yes. (Spt) (d) How would you answers to (a), (b), and (c) change if both objects and objecty are sanitized? (5pt)