2. Fig. 2 shows the directed graph of a computer system. The black dot inside the rectangle show the number of that type resource. For example, the rectangle labeled with r2 means there are two r2-type resource. Answer the following questions: (1) Find existing resource vector E; (2) Find resource allocation matrix C; (3) Find resource request matrix R; (4) Find available resource vector A (5) Is the system deadlocked? If not, what is the order to let all processes run to completion? Pt Fig. 2