(a) (5 Points) Draw a directed graph that corresponds to the access matrix of the figure below. File OBJECTS File 2 File 3 File 4 Own Read Write Own Read User A Write SUBJECTS User B Read Own Read Write Write Read User C Read Write Read Own Read Write (b) (5 Points) Draw a directed graph that corresponds to the access matrix of the figure below. OBJECTS Subjects Files Disk drives S S. Sz F F P. P. D D Processes control Owner owner control reada read owner wakeup wakeup seek owner SUBJECTS control write exccute owner seck S control write stop - copy flag set (c) (5 Points) Is there a one-to-one correspondence between the directed graph representation and the access matrix representation? Explain