Question 4 (6 pts) Using a directed graph to represent each subject and each object by a node, depict the protection state shown in the discretionary access control (DAC) model described in the textbook?. An entity which is both subject and object is represented by a single node. A directed line from a subject to object indicates an access right. A label on that link defines the type of access right. Draw a directed graph that corresponds to the access matrix of Fig. A (see next page). Figure A OBJECTS Files Subjects S2 Processes P. P2 Disk drives D D2 S Sz F F2 S control owner owner control read. read owner wakeup wakeup seek owner SUBJECTS control write execute owner seek S; control write stop copy flag set