1. What is the conent of  the matrix Need?

Need

A  B  C  D

p0   0  0  0  0

P1   0  7  5  0

P2   1  0  0  2

P3   0  0  2  0

P4   0  6  4  2

1. Is the system in a safe state?

Yes. The system is in safe. Because for the sequence of p0, p3, p1, p2, p4. The all process can be finish. At first, we can conclude that p0 is finish, and then, p0 can release all the resource, the available turn to be (1 5 3 2), which