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$1.$ 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